666733398061 has 8 divisors (see below), whose sum is σ = 674385593024. Its totient is φ = 659103877440.

The previous prime is 666733398029. The next prime is 666733398083. The reversal of 666733398061 is 160893337666.

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

It is a cyclic number.

It is not a de Polignac number, because 666733398061 - 2⁵ = 666733398029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666733397987 and 666733398005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666733798061) 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, 5609436 + ... + 5727061.

It is an arithmetic number, because the mean of its divisors is an integer number (84298199128).

Almost surely, 2^666733398061 is an apocalyptic number.

It is an amenable number.

666733398061 is a deficient number, since it is larger than the sum of its proper divisors (7652194963).

666733398061 is a wasteful number, since it uses less digits than its factorization.

666733398061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11337171.

The product of its (nonzero) digits is 17635968, while the sum is 58.

The spelling of 666733398061 in words is "six hundred sixty-six billion, seven hundred thirty-three million, three hundred ninety-eight thousand, sixty-one".