697894668 has 18 divisors (see below), whose sum is σ = 1764122724. Its totient is φ = 232631544.

The previous prime is 697894663. The next prime is 697894679. The reversal of 697894668 is 866498796.

697894668 is a `hidden beast` number, since 6 + 97 + 89 + 466 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (697894663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9692946 + ... + 9693017.

It is an arithmetic number, because the mean of its divisors is an integer number (98006818).

Almost surely, 2^697894668 is an apocalyptic number.

It is an amenable number.

697894668 is an abundant number, since it is smaller than the sum of its proper divisors (1066228056).

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

697894668 is a wasteful number, since it uses less digits than its factorization.

697894668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19385973 (or 19385968 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 63.

The square root of 697894668 is about 26417.6961145366. The cubic root of 697894668 is about 887.0129493976.

The spelling of 697894668 in words is "six hundred ninety-seven million, eight hundred ninety-four thousand, six hundred sixty-eight".