697661064 has 48 divisors (see below), whose sum is σ = 1896374220. Its totient is φ = 231707520.

The previous prime is 697661059. The next prime is 697661077. The reversal of 697661064 is 460166796.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 682776900 + 14884164 = 26130^2 + 3858^2 .

It is a super-2 number, since 2×697661064² = 973461920443224192, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2454 + ... + 37434.

Almost surely, 2^697661064 is an apocalyptic number.

It is an amenable number.

697661064 is an abundant number, since it is smaller than the sum of its proper divisors (1198713156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

697661064 is a wasteful number, since it uses less digits than its factorization.

697661064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35270 (or 35263 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 697661064 is about 26413.2743899729. The cubic root of 697661064 is about 886.9139693717.

The spelling of 697661064 in words is "six hundred ninety-seven million, six hundred sixty-one thousand, sixty-four".