666233376165646 has 32 divisors (see below), whose sum is σ = 1067924867051520. Its totient is φ = 310823719812000.

The previous prime is 666233376165613. The next prime is 666233376165683. The reversal of 666233376165646 is 646561673332666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 453687586 + ... + 455153701.

It is an arithmetic number, because the mean of its divisors is an integer number (33372652095360).

Almost surely, 2^{666233376165646} is an apocalyptic number.

666233376165646 is a deficient number, since it is larger than the sum of its proper divisors (401691490885874).

666233376165646 is a wasteful number, since it uses less digits than its factorization.

666233376165646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908841600.

The product of its digits is 2116316160, while the sum is 70.

The spelling of 666233376165646 in words is "six hundred sixty-six trillion, two hundred thirty-three billion, three hundred seventy-six million, one hundred sixty-five thousand, six hundred forty-six".