669740044 has 12 divisors (see below), whose sum is σ = 1233731800. Its totient is φ = 317245248.

The previous prime is 669740021. The next prime is 669740047. The reversal of 669740044 is 440047966.

It is a junction number, because it is equal to n+sod(n) for n = 669739979 and 669740006.

It is not an unprimeable number, because it can be changed into a prime (669740047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4406109 + ... + 4406260.

Almost surely, 2^669740044 is an apocalyptic number.

It is an amenable number.

669740044 is a deficient number, since it is larger than the sum of its proper divisors (563991756).

669740044 is a wasteful number, since it uses less digits than its factorization.

669740044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8812392 (or 8812390 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 669740044 is about 25879.3362356920. The cubic root of 669740044 is about 874.9208283196.

The spelling of 669740044 in words is "six hundred sixty-nine million, seven hundred forty thousand, forty-four".