664042104 has 64 divisors (see below), whose sum is σ = 2012256000. Its totient is φ = 201224160.

The previous prime is 664042097. The next prime is 664042111. The reversal of 664042104 is 401240466.

664042104 is a `hidden beast` number, since 6 + 640 + 4 + 2 + 10 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (664042097) and next prime (664042111).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137364 + ... + 142115.

It is an arithmetic number, because the mean of its divisors is an integer number (31441500).

Almost surely, 2^664042104 is an apocalyptic number.

It is an amenable number.

664042104 is an abundant number, since it is smaller than the sum of its proper divisors (1348213896).

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

664042104 is a wasteful number, since it uses less digits than its factorization.

664042104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279505 (or 279495 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 664042104 is about 25769.0144165430. The cubic root of 664042104 is about 872.4325737229.

The spelling of 664042104 in words is "six hundred sixty-four million, forty-two thousand, one hundred four".