666740733667 has 8 divisors (see below), whose sum is σ = 673915424000. Its totient is φ = 659572187904.

The previous prime is 666740733623. The next prime is 666740733671. The reversal of 666740733667 is 766337047666.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666740733667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666740733367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1317792 + ... + 1752157.

It is an arithmetic number, because the mean of its divisors is an integer number (84239428000).

Almost surely, 2^666740733667 is an apocalyptic number.

666740733667 is a deficient number, since it is larger than the sum of its proper divisors (7174690333).

666740733667 is a wasteful number, since it uses less digits than its factorization.

666740733667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3072285.

The product of its (nonzero) digits is 96018048, while the sum is 61.

The spelling of 666740733667 in words is "six hundred sixty-six billion, seven hundred forty million, seven hundred thirty-three thousand, six hundred sixty-seven".