690265665 has 32 divisors (see below), whose sum is σ = 1229276160. Its totient is φ = 367500672.

The previous prime is 690265633. The next prime is 690265703. The reversal of 690265665 is 566562096.

690265665 is a `hidden beast` number, since 69 + 0 + 26 + 566 + 5 = 666.

It is not a de Polignac number, because 690265665 - 2⁵ = 690265633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 690265665.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79152 + ... + 87438.

It is an arithmetic number, because the mean of its divisors is an integer number (38414880).

Almost surely, 2^690265665 is an apocalyptic number.

It is an amenable number.

690265665 is a deficient number, since it is larger than the sum of its proper divisors (539010495).

690265665 is a wasteful number, since it uses less digits than its factorization.

690265665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8918 (or 8912 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The square root of 690265665 is about 26272.9074333238. The cubic root of 690265665 is about 883.7689865595.

It can be divided in two parts, 69026 and 5665, that added together give a triangular number (74691 = T₃₈₆).

The spelling of 690265665 in words is "six hundred ninety million, two hundred sixty-five thousand, six hundred sixty-five".