666140615750040 has 64 divisors (see below), whose sum is σ = 1999711984572000. Its totient is φ = 177522818660352.

The previous prime is 666140615750021. The next prime is 666140615750041. The reversal of 666140615750040 is 40057516041666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666140615750041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1791670737 + ... + 1792042496.

Almost surely, 2^{666140615750040} is an apocalyptic number.

666140615750040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

666140615750040 is an abundant number, since it is smaller than the sum of its proper divisors (1333571368821960).

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

666140615750040 is a wasteful number, since it uses less digits than its factorization.

666140615750040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3583714796 (or 3583714792 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 51.

The spelling of 666140615750040 in words is "six hundred sixty-six trillion, one hundred forty billion, six hundred fifteen million, seven hundred fifty thousand, forty".