696537664 has 21 divisors (see below), whose sum is σ = 1382611027. Its totient is φ = 348163264.

The previous prime is 696537661. The next prime is 696537671. The reversal of 696537664 is 466735696.

The square root of 696537664 is 26392.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (696537661) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 209487 + ... + 212785.

Almost surely, 2^696537664 is an apocalyptic number.

696537664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

696537664 is the 26392-nd square number.

It is an amenable number.

696537664 is a deficient number, since it is larger than the sum of its proper divisors (686073363).

696537664 is an frugal number, since it uses more digits than its factorization.

696537664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6610 (or 3301 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 52.

The cubic root of 696537664 is about 886.4376662521.

The spelling of 696537664 in words is "six hundred ninety-six million, five hundred thirty-seven thousand, six hundred sixty-four".