669475512 has 24 divisors (see below), whose sum is σ = 1813163040. Its totient is φ = 223158480.

The previous prime is 669475459. The next prime is 669475517. The reversal of 669475512 is 215574966.

669475512 is a `hidden beast` number, since 6 + 6 + 94 + 7 + 551 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×669475512² = 896394922335324288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669475517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4649064 + ... + 4649207.

It is an arithmetic number, because the mean of its divisors is an integer number (75548460).

Almost surely, 2^669475512 is an apocalyptic number.

It is an amenable number.

669475512 is an abundant number, since it is smaller than the sum of its proper divisors (1143687528).

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

669475512 is a wasteful number, since it uses less digits than its factorization.

669475512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9298283 (or 9298276 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 669475512 is about 25874.2248579547. The cubic root of 669475512 is about 874.8056219112.

The spelling of 669475512 in words is "six hundred sixty-nine million, four hundred seventy-five thousand, five hundred twelve".