666006701694 has 32 divisors (see below), whose sum is σ = 1340093776896. Its totient is φ = 220655712480.

The previous prime is 666006701693. The next prime is 666006701827. The reversal of 666006701694 is 496107600666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666006701693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23950939 + ... + 23978729.

It is an arithmetic number, because the mean of its divisors is an integer number (41877930528).

Almost surely, 2^666006701694 is an apocalyptic number.

666006701694 is an abundant number, since it is smaller than the sum of its proper divisors (674087075202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666006701694 is a wasteful number, since it uses less digits than its factorization.

666006701694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51880.

The product of its (nonzero) digits is 1959552, while the sum is 51.

The spelling of 666006701694 in words is "six hundred sixty-six billion, six million, seven hundred one thousand, six hundred ninety-four".