669637941 has 16 divisors (see below), whose sum is σ = 1032697344. Its totient is φ = 378039024.

The previous prime is 669637937. The next prime is 669638009. The reversal of 669637941 is 149736966.

It is not a de Polignac number, because 669637941 - 2² = 669637937 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669637841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190351 + ... + 193836.

It is an arithmetic number, because the mean of its divisors is an integer number (64543584).

Almost surely, 2^669637941 is an apocalyptic number.

It is an amenable number.

669637941 is a deficient number, since it is larger than the sum of its proper divisors (363059403).

669637941 is a wasteful number, since it uses less digits than its factorization.

669637941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384280.

The product of its digits is 1469664, while the sum is 51.

The square root of 669637941 is about 25877.3634862596. The cubic root of 669637941 is about 874.8763650077.

The spelling of 669637941 in words is "six hundred sixty-nine million, six hundred thirty-seven thousand, nine hundred forty-one".