664155022 has 16 divisors (see below), whose sum is σ = 1011307680. Its totient is φ = 327065472.

The previous prime is 664154999. The next prime is 664155043. The reversal of 664155022 is 220551466.

It is a super-2 number, since 2×664155022² = 882203786495640968, which contains 22 as substring.

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, 115303 + ... + 120925.

It is an arithmetic number, because the mean of its divisors is an integer number (63206730).

Almost surely, 2^664155022 is an apocalyptic number.

664155022 is a deficient number, since it is larger than the sum of its proper divisors (347152658).

664155022 is a wasteful number, since it uses less digits than its factorization.

664155022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6507.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 664155022 is about 25771.2052880730. The cubic root of 664155022 is about 872.4820222731.

The spelling of 664155022 in words is "six hundred sixty-four million, one hundred fifty-five thousand, twenty-two".