664722054 has 24 divisors (see below), whose sum is σ = 1440847512. Its totient is φ = 221479200.

The previous prime is 664722041. The next prime is 664722059. The reversal of 664722054 is 450227466.

664722054 is a `hidden beast` number, since 6 + 647 + 2 + 2 + 0 + 5 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664722059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44842 + ... + 57794.

It is an arithmetic number, because the mean of its divisors is an integer number (60035313).

Almost surely, 2^664722054 is an apocalyptic number.

664722054 is an abundant number, since it is smaller than the sum of its proper divisors (776125458).

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

664722054 is a wasteful number, since it uses less digits than its factorization.

664722054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15812 (or 15809 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 664722054 is about 25782.2042114323. The cubic root of 664722054 is about 872.7302497117.

The spelling of 664722054 in words is "six hundred sixty-four million, seven hundred twenty-two thousand, fifty-four".