1662120351 has 8 divisors (see below), whose sum is σ = 2462400560. Its totient is φ = 1108080216.

The previous prime is 1662120349. The next prime is 1662120353. The reversal of 1662120351 is 1530212661.

1662120351 is a `hidden beast` number, since 1 + 6 + 621 + 2 + 0 + 35 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (1662120349) and next prime (1662120353).

It is not a de Polignac number, because 1662120351 - 2¹ = 1662120349 is a prime.

It is a super-2 number, since 2×1662120351² = 5525288122416726402, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 61560013 = 1662120351 / (1 + 6 + 6 + 2 + 1 + 2 + 0 + 3 + 5 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662120353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30779980 + ... + 30780033.

It is an arithmetic number, because the mean of its divisors is an integer number (307800070).

Almost surely, 2^1662120351 is an apocalyptic number.

1662120351 is a deficient number, since it is larger than the sum of its proper divisors (800280209).

1662120351 is an equidigital number, since it uses as much as digits as its factorization.

1662120351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61560022 (or 61560016 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1662120351 is about 40769.1102551920. The cubic root of 1662120351 is about 1184.5520691265.

The spelling of 1662120351 in words is "one billion, six hundred sixty-two million, one hundred twenty thousand, three hundred fifty-one".