662688564 has 12 divisors (see below), whose sum is σ = 1546273344. Its totient is φ = 220896184.

The previous prime is 662688553. The next prime is 662688601. The reversal of 662688564 is 465886266.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×662688564² = 878312265712764192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27612012 + ... + 27612035.

It is an arithmetic number, because the mean of its divisors is an integer number (128856112).

Almost surely, 2^662688564 is an apocalyptic number.

It is an amenable number.

662688564 is an abundant number, since it is smaller than the sum of its proper divisors (883584780).

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

662688564 is a wasteful number, since it uses less digits than its factorization.

662688564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55224054 (or 55224052 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 51.

The square root of 662688564 is about 25742.7380828070. The cubic root of 662688564 is about 871.8394006765.

The spelling of 662688564 in words is "six hundred sixty-two million, six hundred eighty-eight thousand, five hundred sixty-four".