666109714442 has 64 divisors (see below), whose sum is σ = 1052339143680. Its totient is φ = 315812711424.

The previous prime is 666109714397. The next prime is 666109714453. The reversal of 666109714442 is 244417901666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 365391143 + ... + 365392965.

It is an arithmetic number, because the mean of its divisors is an integer number (16442799120).

Almost surely, 2^666109714442 is an apocalyptic number.

666109714442 is a deficient number, since it is larger than the sum of its proper divisors (386229429238).

666109714442 is a wasteful number, since it uses less digits than its factorization.

666109714442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2447.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 666109714442 in words is "six hundred sixty-six billion, one hundred nine million, seven hundred fourteen thousand, four hundred forty-two".