666425524666 has 32 divisors (see below), whose sum is σ = 1148004241920. Its totient is φ = 286953937200.

The previous prime is 666425524663. The next prime is 666425524669.

666425524666 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (666425524663) and next prime (666425524669).

It is a self number, because there is not a number n which added to its sum of digits gives 666425524666.

It is not an unprimeable number, because it can be changed into a prime (666425524663) 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, 5622385 + ... + 5739691.

It is an arithmetic number, because the mean of its divisors is an integer number (35875132560).

Almost surely, 2^666425524666 is an apocalyptic number.

666425524666 is a deficient number, since it is larger than the sum of its proper divisors (481578717254).

666425524666 is a wasteful number, since it uses less digits than its factorization.

666425524666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130930.

The product of its digits is 74649600, while the sum is 58.

The spelling of 666425524666 in words is "six hundred sixty-six billion, four hundred twenty-five million, five hundred twenty-four thousand, six hundred sixty-six".