669042136 has 32 divisors (see below), whose sum is σ = 1509120000. Its totient is φ = 271640736.

The previous prime is 669042113. The next prime is 669042137. The reversal of 669042136 is 631240966.

It is a happy number.

669042136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 669042095 and 669042104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669042137) 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, 313336 + ... + 315463.

It is an arithmetic number, because the mean of its divisors is an integer number (47160000).

Almost surely, 2^669042136 is an apocalyptic number.

It is an amenable number.

669042136 is an abundant number, since it is smaller than the sum of its proper divisors (840077864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669042136 is a wasteful number, since it uses less digits than its factorization.

669042136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628831 (or 628827 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 669042136 is about 25865.8488358685. The cubic root of 669042136 is about 874.6168166003.

The spelling of 669042136 in words is "six hundred sixty-nine million, forty-two thousand, one hundred thirty-six".