697985660 has 24 divisors (see below), whose sum is σ = 1551992400. Its totient is φ = 262770944.

The previous prime is 697985647. The next prime is 697985671. The reversal of 697985660 is 66589796.

It is a junction number, because it is equal to n+sod(n) for n = 697985596 and 697985605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1026110 + ... + 1026789.

It is an arithmetic number, because the mean of its divisors is an integer number (64666350).

Almost surely, 2^697985660 is an apocalyptic number.

It is an amenable number.

697985660 is an abundant number, since it is smaller than the sum of its proper divisors (854006740).

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

697985660 is a wasteful number, since it uses less digits than its factorization.

697985660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052925 (or 2052923 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 56.

The square root of 697985660 is about 26419.4182373496. The cubic root of 697985660 is about 887.0514975141.

The spelling of 697985660 in words is "six hundred ninety-seven million, nine hundred eighty-five thousand, six hundred sixty".