695729664 has 120 divisors (see below), whose sum is σ = 2294875440. Its totient is φ = 198770688.

The previous prime is 695729653. The next prime is 695729677. The reversal of 695729664 is 466927596.

695729664 is a `hidden beast` number, since 6 + 9 + 572 + 9 + 6 + 64 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 695729664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21472 + ... + 43040.

It is an arithmetic number, because the mean of its divisors is an integer number (19123962).

Almost surely, 2^695729664 is an apocalyptic number.

695729664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 695729664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1147437720).

695729664 is an abundant number, since it is smaller than the sum of its proper divisors (1599145776).

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

695729664 is a wasteful number, since it uses less digits than its factorization.

695729664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21600 (or 21581 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The square root of 695729664 is about 26376.6878891191. The cubic root of 695729664 is about 886.0947708125.

The spelling of 695729664 in words is "six hundred ninety-five million, seven hundred twenty-nine thousand, six hundred sixty-four".