1662020249 has 8 divisors (see below), whose sum is σ = 1782063360. Its totient is φ = 1544452416.

The previous prime is 1662020233. The next prime is 1662020263. The reversal of 1662020249 is 9420202661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1662020249 - 2⁴ = 1662020233 is a prime.

It is a super-2 number, since 2×1662020249² = 5524622616172044002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1662020299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 617429 + ... + 620114.

It is an arithmetic number, because the mean of its divisors is an integer number (222757920).

Almost surely, 2^1662020249 is an apocalyptic number.

It is an amenable number.

1662020249 is a deficient number, since it is larger than the sum of its proper divisors (120043111).

1662020249 is a wasteful number, since it uses less digits than its factorization.

1662020249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237639.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1662020249 is about 40767.8825670404. The cubic root of 1662020249 is about 1184.5282885758.

The spelling of 1662020249 in words is "one billion, six hundred sixty-two million, twenty thousand, two hundred forty-nine".