666492464294666 has 32 divisors (see below), whose sum is σ = 1002310127634816. Its totient is φ = 332390129688000.

The previous prime is 666492464294621. The next prime is 666492464294801.

666492464294666 is nontrivially palindromic in base 10.

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, 9872319851 + ... + 9872387361.

It is an arithmetic number, because the mean of its divisors is an integer number (31322191488588).

Almost surely, 2^{666492464294666} is an apocalyptic number.

666492464294666 is a deficient number, since it is larger than the sum of its proper divisors (335817663340150).

666492464294666 is a wasteful number, since it uses less digits than its factorization.

666492464294666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75038.

The product of its digits is 23219011584, while the sum is 80.

The spelling of 666492464294666 in words is "six hundred sixty-six trillion, four hundred ninety-two billion, four hundred sixty-four million, two hundred ninety-four thousand, six hundred sixty-six".