669517340 has 12 divisors (see below), whose sum is σ = 1405986456. Its totient is φ = 267806928.

The previous prime is 669517333. The next prime is 669517367. The reversal of 669517340 is 43715966.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16737914 + ... + 16737953.

It is an arithmetic number, because the mean of its divisors is an integer number (117165538).

Almost surely, 2^669517340 is an apocalyptic number.

It is an amenable number.

669517340 is an abundant number, since it is smaller than the sum of its proper divisors (736469116).

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

669517340 is a wasteful number, since it uses less digits than its factorization.

669517340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33475876 (or 33475874 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 669517340 is about 25875.0331400754. The cubic root of 669517340 is about 874.8238404554.

The spelling of 669517340 in words is "six hundred sixty-nine million, five hundred seventeen thousand, three hundred forty".