664125539 has 8 divisors (see below), whose sum is σ = 828000768. Its totient is φ = 517500360.

The previous prime is 664125533. The next prime is 664125547. The reversal of 664125539 is 935521466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 664125539 - 2¹⁶ = 664060003 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664125496 and 664125505.

It is not an unprimeable number, because it can be changed into a prime (664125533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4312427 + ... + 4312580.

It is an arithmetic number, because the mean of its divisors is an integer number (103500096).

Almost surely, 2^664125539 is an apocalyptic number.

664125539 is a deficient number, since it is larger than the sum of its proper divisors (163875229).

664125539 is a wasteful number, since it uses less digits than its factorization.

664125539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8625025.

The product of its digits is 194400, while the sum is 41.

The square root of 664125539 is about 25770.6332673452. The cubic root of 664125539 is about 872.4691117490.

The spelling of 664125539 in words is "six hundred sixty-four million, one hundred twenty-five thousand, five hundred thirty-nine".