669301644434 has 4 divisors (see below), whose sum is σ = 1003952466654. Its totient is φ = 334650822216.

The previous prime is 669301644413. The next prime is 669301644457. The reversal of 669301644434 is 434446103966.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 612611463025 + 56690181409 = 782695^2 + 238097^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167325411107 + ... + 167325411110.

Almost surely, 2^669301644434 is an apocalyptic number.

669301644434 is a deficient number, since it is larger than the sum of its proper divisors (334650822220).

669301644434 is a wasteful number, since it uses less digits than its factorization.

669301644434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334650822219.

The product of its (nonzero) digits is 4478976, while the sum is 50.

The spelling of 669301644434 in words is "six hundred sixty-nine billion, three hundred one million, six hundred forty-four thousand, four hundred thirty-four".