664386285 has 16 divisors (see below), whose sum is σ = 1065335040. Its totient is φ = 353567040.

The previous prime is 664386277. The next prime is 664386293. The reversal of 664386285 is 582683466.

It is an interprime number because it is at equal distance from previous prime (664386277) and next prime (664386293).

It is not a de Polignac number, because 664386285 - 2³ = 664386277 is a prime.

It is a super-2 number, since 2×664386285² = 882818271392202450, 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 15 ways as a sum of consecutive naturals, for example, 41125 + ... + 54954.

It is an arithmetic number, because the mean of its divisors is an integer number (66583440).

Almost surely, 2^664386285 is an apocalyptic number.

It is an amenable number.

664386285 is a deficient number, since it is larger than the sum of its proper divisors (400948755).

664386285 is a wasteful number, since it uses less digits than its factorization.

664386285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96548.

The product of its digits is 1658880, while the sum is 48.

The square root of 664386285 is about 25775.6917462946. The cubic root of 664386285 is about 872.5832784498.

The spelling of 664386285 in words is "six hundred sixty-four million, three hundred eighty-six thousand, two hundred eighty-five".