697966628 has 6 divisors (see below), whose sum is σ = 1221441606. Its totient is φ = 348983312.

The previous prime is 697966613. The next prime is 697966673. The reversal of 697966628 is 826669796.

It can be written as a sum of positive squares in only one way, i.e., 634636864 + 63329764 = 25192^2 + 7958^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87245825 + ... + 87245832.

It is an arithmetic number, because the mean of its divisors is an integer number (203573601).

Almost surely, 2^697966628 is an apocalyptic number.

It is an amenable number.

697966628 is a deficient number, since it is larger than the sum of its proper divisors (523474978).

697966628 is a wasteful number, since it uses less digits than its factorization.

697966628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174491661 (or 174491659 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 59.

The square root of 697966628 is about 26419.0580452824. The cubic root of 697966628 is about 887.0434350191.

It can be divided in two parts, 69 and 7966628, that added together give a palindrome (7966697).

The spelling of 697966628 in words is "six hundred ninety-seven million, nine hundred sixty-six thousand, six hundred twenty-eight".