669056136 has 64 divisors (see below), whose sum is σ = 1973268480. Its totient is φ = 184991040.

The previous prime is 669056093. The next prime is 669056159. The reversal of 669056136 is 631650966.

669056136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×669056136² = 895272226238500992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59026 + ... + 69441.

It is an arithmetic number, because the mean of its divisors is an integer number (30832320).

Almost surely, 2^669056136 is an apocalyptic number.

It is an amenable number.

669056136 is an abundant number, since it is smaller than the sum of its proper divisors (1304212344).

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

669056136 is a wasteful number, since it uses less digits than its factorization.

669056136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128514 (or 128510 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 42.

The square root of 669056136 is about 25866.1194615659. The cubic root of 669056136 is about 874.6229171378.

It can be divided in two parts, 6690 and 56136, that added together give a palindrome (62826).

The spelling of 669056136 in words is "six hundred sixty-nine million, fifty-six thousand, one hundred thirty-six".