1662215445 has 64 divisors (see below), whose sum is σ = 3238548480. Its totient is φ = 802209600.

The previous prime is 1662215441. The next prime is 1662215449. The reversal of 1662215445 is 5445122661.

1662215445 is a `hidden beast` number, since 16 + 622 + 15 + 4 + 4 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (1662215441) and next prime (1662215449).

It is not a de Polignac number, because 1662215445 - 2² = 1662215441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662215441) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 334630 + ... + 339560.

It is an arithmetic number, because the mean of its divisors is an integer number (50602320).

Almost surely, 2^1662215445 is an apocalyptic number.

1662215445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1662215445 is a deficient number, since it is larger than the sum of its proper divisors (1576333035).

1662215445 is a wasteful number, since it uses less digits than its factorization.

1662215445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5183 (or 5177 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 1662215445 is about 40770.2764891287. The cubic root of 1662215445 is about 1184.5746590764.

The spelling of 1662215445 in words is "one billion, six hundred sixty-two million, two hundred fifteen thousand, four hundred forty-five".