664012142 has 16 divisors (see below), whose sum is σ = 1009654800. Its totient is φ = 327483648.

The previous prime is 664012127. The next prime is 664012199. The reversal of 664012142 is 241210466.

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, 53984 + ... + 65132.

It is an arithmetic number, because the mean of its divisors is an integer number (63103425).

Almost surely, 2^664012142 is an apocalyptic number.

664012142 is a deficient number, since it is larger than the sum of its proper divisors (345642658).

664012142 is a wasteful number, since it uses less digits than its factorization.

664012142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11555.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 664012142 is about 25768.4330528653. The cubic root of 664012142 is about 872.4194519556.

The spelling of 664012142 in words is "six hundred sixty-four million, twelve thousand, one hundred forty-two".