664014125 has 16 divisors (see below), whose sum is σ = 832344240. Its totient is φ = 528868800.

The previous prime is 664014121. The next prime is 664014133. The reversal of 664014125 is 521410466.

It can be written as a sum of positive squares in 8 ways, for example, as 261048649 + 402965476 = 16157^2 + 20074^2 .

It is not a de Polignac number, because 664014125 - 2² = 664014121 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664014121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17027 + ... + 40223.

It is an arithmetic number, because the mean of its divisors is an integer number (52021515).

Almost surely, 2^664014125 is an apocalyptic number.

It is an amenable number.

664014125 is a deficient number, since it is larger than the sum of its proper divisors (168330115).

664014125 is a wasteful number, since it uses less digits than its factorization.

664014125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23441 (or 23431 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 664014125 is about 25768.4715301471. The cubic root of 664014125 is about 872.4203204166.

The spelling of 664014125 in words is "six hundred sixty-four million, fourteen thousand, one hundred twenty-five".