667194009440 has 96 divisors (see below), whose sum is σ = 1801632248640. Its totient is φ = 228725766144.

The previous prime is 667194009437. The next prime is 667194009451. The reversal of 667194009440 is 44900491766.

It is a super-2 number, since 2×667194009440² (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 15 ways as a sum of consecutive naturals, for example, 11319566 + ... + 11378354.

It is an arithmetic number, because the mean of its divisors is an integer number (18767002590).

Almost surely, 2^667194009440 is an apocalyptic number.

It is an amenable number.

667194009440 is an abundant number, since it is smaller than the sum of its proper divisors (1134438239200).

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

667194009440 is a wasteful number, since it uses less digits than its factorization.

667194009440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68944 (or 68936 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 667194009440 in words is "six hundred sixty-seven billion, one hundred ninety-four million, nine thousand, four hundred forty".