665242634004 has 24 divisors (see below), whose sum is σ = 1671635337120. Its totient is φ = 204690041184.

The previous prime is 665242633997. The next prime is 665242634083. The reversal of 665242634004 is 400436242566.

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, 2132187774 + ... + 2132188085.

It is an arithmetic number, because the mean of its divisors is an integer number (69651472380).

Almost surely, 2^665242634004 is an apocalyptic number.

It is an amenable number.

665242634004 is an abundant number, since it is smaller than the sum of its proper divisors (1006392703116).

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

665242634004 is a wasteful number, since it uses less digits than its factorization.

665242634004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4264375879 (or 4264375877 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 42.

The spelling of 665242634004 in words is "six hundred sixty-five billion, two hundred forty-two million, six hundred thirty-four thousand, four".