669563970 has 32 divisors (see below), whose sum is σ = 1608266880. Its totient is φ = 178404480.

The previous prime is 669563959. The next prime is 669563987. The reversal of 669563970 is 79365966.

669563970 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-3 number, since 3×669563970³ (a number of 27 digits) contains 333 as substring.

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, 31110 + ... + 48030.

It is an arithmetic number, because the mean of its divisors is an integer number (50258340).

Almost surely, 2^669563970 is an apocalyptic number.

669563970 is an abundant number, since it is smaller than the sum of its proper divisors (938702910).

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

669563970 is a wasteful number, since it uses less digits than its factorization.

669563970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18250.

The product of its (nonzero) digits is 1837080, while the sum is 51.

The square root of 669563970 is about 25875.9341860347. The cubic root of 669563970 is about 874.8441496574.

The spelling of 669563970 in words is "six hundred sixty-nine million, five hundred sixty-three thousand, nine hundred seventy".