666667007040 has 56 divisors (see below), whose sum is σ = 2116667750400. Its totient is φ = 177777868288.

The previous prime is 666667007003. The next prime is 666667007053. The reversal of 666667007040 is 40700766666.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 347221440 + ... + 347223359.

It is an arithmetic number, because the mean of its divisors is an integer number (37797638400).

Almost surely, 2^666667007040 is an apocalyptic number.

666667007040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

666667007040 is an abundant number, since it is smaller than the sum of its proper divisors (1450000743360).

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

666667007040 is a wasteful number, since it uses less digits than its factorization.

666667007040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694444819 (or 694444809 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 48.

The spelling of 666667007040 in words is "six hundred sixty-six billion, six hundred sixty-seven million, seven thousand, forty".