669039213736 has 32 divisors (see below), whose sum is σ = 1283992560000. Its totient is φ = 326672905216.

The previous prime is 669039213721. The next prime is 669039213761. The reversal of 669039213736 is 637312930966.

669039213736 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 2×669039213736² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1812646 + ... + 2150293.

It is an arithmetic number, because the mean of its divisors is an integer number (40124767500).

Almost surely, 2^669039213736 is an apocalyptic number.

It is an amenable number.

669039213736 is a deficient number, since it is larger than the sum of its proper divisors (614953346264).

669039213736 is a wasteful number, since it uses less digits than its factorization.

669039213736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3963441 (or 3963437 counting only the distinct ones).

The product of its (nonzero) digits is 6613488, while the sum is 55.

The spelling of 669039213736 in words is "six hundred sixty-nine billion, thirty-nine million, two hundred thirteen thousand, seven hundred thirty-six".