669738870 has 48 divisors (see below), whose sum is σ = 1742598000. Its totient is φ = 178466112.

The previous prime is 669738841. The next prime is 669738893. The reversal of 669738870 is 78837966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 242256 + ... + 245004.

It is an arithmetic number, because the mean of its divisors is an integer number (36304125).

Almost surely, 2^669738870 is an apocalyptic number.

669738870 is an abundant number, since it is smaller than the sum of its proper divisors (1072859130).

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

669738870 is a wasteful number, since it uses less digits than its factorization.

669738870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5469 (or 5466 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The square root of 669738870 is about 25879.3135534929. The cubic root of 669738870 is about 874.9203170975.

The spelling of 669738870 in words is "six hundred sixty-nine million, seven hundred thirty-eight thousand, eight hundred seventy".