669740031 has 12 divisors (see below), whose sum is σ = 979058808. Its totient is φ = 441113424.

The previous prime is 669740021. The next prime is 669740047. The reversal of 669740031 is 130047966.

It is not a de Polignac number, because 669740031 - 2¹⁵ = 669707263 is a prime.

It is a super-2 number, since 2×669740031² = 897103418247761922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669740021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 447540 + ... + 449033.

It is an arithmetic number, because the mean of its divisors is an integer number (81588234).

Almost surely, 2^669740031 is an apocalyptic number.

669740031 is a deficient number, since it is larger than the sum of its proper divisors (309318777).

669740031 is a wasteful number, since it uses less digits than its factorization.

669740031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896662 (or 896659 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 669740031 is about 25879.3359845263. The cubic root of 669740031 is about 874.9208226587.

Adding to 669740031 its reverse (130047966), we get a palindrome (799787997).

The spelling of 669740031 in words is "six hundred sixty-nine million, seven hundred forty thousand, thirty-one".