697901664 has 48 divisors (see below), whose sum is σ = 1834721280. Its totient is φ = 232287360.

The previous prime is 697901651. The next prime is 697901683. The reversal of 697901664 is 466109796.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×697901664² = 974133465227937792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63969 + ... + 74079.

It is an arithmetic number, because the mean of its divisors is an integer number (38223360).

Almost surely, 2^697901664 is an apocalyptic number.

It is an amenable number.

697901664 is an abundant number, since it is smaller than the sum of its proper divisors (1136819616).

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

697901664 is a wasteful number, since it uses less digits than its factorization.

697901664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10843 (or 10835 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 697901664 is about 26417.8285254485. The cubic root of 697901664 is about 887.0159133224.

The spelling of 697901664 in words is "six hundred ninety-seven million, nine hundred one thousand, six hundred sixty-four".