666472274666 has 16 divisors (see below), whose sum is σ = 1105951434048. Its totient is φ = 298675154400.

The previous prime is 666472274659. The next prime is 666472274669.

666472274666 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 666472274599 and 666472274608.

It is not an unprimeable number, because it can be changed into a prime (666472274669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213337835 + ... + 213340958.

It is an arithmetic number, because the mean of its divisors is an integer number (69121964628).

Almost surely, 2^666472274666 is an apocalyptic number.

666472274666 is a deficient number, since it is larger than the sum of its proper divisors (439479159382).

666472274666 is a wasteful number, since it uses less digits than its factorization.

666472274666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426678877.

The product of its digits is 146313216, while the sum is 62.

The spelling of 666472274666 in words is "six hundred sixty-six billion, four hundred seventy-two million, two hundred seventy-four thousand, six hundred sixty-six".