665440167004 has 12 divisors (see below), whose sum is σ = 1164552706800. Its totient is φ = 332710822208.

The previous prime is 665440166971. The next prime is 665440167019. The reversal of 665440167004 is 400761044566.

It is a super-2 number, since 2×665440167004² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2152384 + ... + 2442055.

It is an arithmetic number, because the mean of its divisors is an integer number (97046058900).

Almost surely, 2^665440167004 is an apocalyptic number.

It is an amenable number.

665440167004 is a deficient number, since it is larger than the sum of its proper divisors (499112539796).

665440167004 is a wasteful number, since it uses less digits than its factorization.

665440167004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4630652 (or 4630650 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 665440167004 in words is "six hundred sixty-five billion, four hundred forty million, one hundred sixty-seven thousand, four".