698615664 has 40 divisors (see below), whose sum is σ = 1818550272. Its totient is φ = 231092160.

The previous prime is 698615657. The next prime is 698615677. The reversal of 698615664 is 466516896.

It is a happy number.

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, 49264 + ... + 61839.

Almost surely, 2^698615664 is an apocalyptic number.

It is an amenable number.

698615664 is an abundant number, since it is smaller than the sum of its proper divisors (1119934608).

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

698615664 is a wasteful number, since it uses less digits than its factorization.

698615664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111245 (or 111239 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 51.

The square root of 698615664 is about 26431.3386721142. The cubic root of 698615664 is about 887.3183023923.

The spelling of 698615664 in words is "six hundred ninety-eight million, six hundred fifteen thousand, six hundred sixty-four".