669666270 has 64 divisors (see below), whose sum is σ = 1978099200. Its totient is φ = 141291648.

The previous prime is 669666269. The next prime is 669666287. The reversal of 669666270 is 72666966.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119920 + ... + 125379.

It is an arithmetic number, because the mean of its divisors is an integer number (30907800).

Almost surely, 2^669666270 is an apocalyptic number.

669666270 is an abundant number, since it is smaller than the sum of its proper divisors (1308432930).

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

669666270 is a wasteful number, since it uses less digits than its factorization.

669666270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245329.

The product of its (nonzero) digits is 979776, while the sum is 48.

The square root of 669666270 is about 25877.9108507623. The cubic root of 669666270 is about 874.8887020342. Note that the first 3 decimals are identical.

The spelling of 669666270 in words is "six hundred sixty-nine million, six hundred sixty-six thousand, two hundred seventy".