1662665913 has 8 divisors (see below), whose sum is σ = 2463208800. Its totient is φ = 1108443924.

The previous prime is 1662665833. The next prime is 1662665941. The reversal of 1662665913 is 3195662661.

1662665913 is a `hidden beast` number, since 1 + 6 + 626 + 6 + 5 + 9 + 13 = 666.

It is not a de Polignac number, because 1662665913 - 2⁸ = 1662665657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1662665413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30790083 + ... + 30790136.

It is an arithmetic number, because the mean of its divisors is an integer number (307901100).

Almost surely, 2^1662665913 is an apocalyptic number.

It is an amenable number.

1662665913 is a deficient number, since it is larger than the sum of its proper divisors (800542887).

1662665913 is an equidigital number, since it uses as much as digits as its factorization.

1662665913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61580228 (or 61580222 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 1662665913 is about 40775.8005807366. The cubic root of 1662665913 is about 1184.6816577976.

The spelling of 1662665913 in words is "one billion, six hundred sixty-two million, six hundred sixty-five thousand, nine hundred thirteen".