666140615750042 has 8 divisors (see below), whose sum is σ = 999762669032832. Its totient is φ = 332886392739100.

The previous prime is 666140615750041. The next prime is 666140615750059. The reversal of 666140615750042 is 240057516041666.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 91957563434 + ... + 91957570677.

It is an arithmetic number, because the mean of its divisors is an integer number (124970333629104).

Almost surely, 2^{666140615750042} is an apocalyptic number.

666140615750042 is a deficient number, since it is larger than the sum of its proper divisors (333622053282790).

666140615750042 is a wasteful number, since it uses less digits than its factorization.

666140615750042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183915135924.

The product of its (nonzero) digits is 7257600, while the sum is 53.

The spelling of 666140615750042 in words is "six hundred sixty-six trillion, one hundred forty billion, six hundred fifteen million, seven hundred fifty thousand, forty-two".