666355347764206 has 16 divisors (see below), whose sum is σ = 1046756289523104. Its totient is φ = 317541176545824.

The previous prime is 666355347764177. The next prime is 666355347764219. The reversal of 666355347764206 is 602467743553666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26147976105 + ... + 26148001588.

It is an arithmetic number, because the mean of its divisors is an integer number (65422268095194).

Almost surely, 2^{666355347764206} is an apocalyptic number.

666355347764206 is a deficient number, since it is larger than the sum of its proper divisors (380400941758898).

666355347764206 is a wasteful number, since it uses less digits than its factorization.

666355347764206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52295977995.

The product of its (nonzero) digits is 2743372800, while the sum is 70.

The spelling of 666355347764206 in words is "six hundred sixty-six trillion, three hundred fifty-five billion, three hundred forty-seven million, seven hundred sixty-four thousand, two hundred six".