666733736707 has 32 divisors (see below), whose sum is σ = 722042482752. Its totient is φ = 613382160384.

The previous prime is 666733736689. The next prime is 666733736729. The reversal of 666733736707 is 707637337666.

It is a happy number.

It is not a de Polignac number, because 666733736707 - 2³⁹ = 116977922819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666733734707) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114418528 + ... + 114424354.

It is an arithmetic number, because the mean of its divisors is an integer number (22563827586).

Almost surely, 2^666733736707 is an apocalyptic number.

666733736707 is a deficient number, since it is larger than the sum of its proper divisors (55308746045).

666733736707 is a wasteful number, since it uses less digits than its factorization.

666733736707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6727.

The product of its (nonzero) digits is 84015792, while the sum is 61.

The spelling of 666733736707 in words is "six hundred sixty-six billion, seven hundred thirty-three million, seven hundred thirty-six thousand, seven hundred seven".