667089231820 has 48 divisors (see below), whose sum is σ = 1529720726688. Its totient is φ = 242342991360.

The previous prime is 667089231797. The next prime is 667089231857. The reversal of 667089231820 is 28132980766.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

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, 1240419 + ... + 1694938.

It is an arithmetic number, because the mean of its divisors is an integer number (31869181806).

Almost surely, 2^667089231820 is an apocalyptic number.

It is an amenable number.

667089231820 is an abundant number, since it is smaller than the sum of its proper divisors (862631494868).

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

667089231820 is a wasteful number, since it uses less digits than its factorization.

667089231820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936410 (or 2936408 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 667089231820 in words is "six hundred sixty-seven billion, eighty-nine million, two hundred thirty-one thousand, eight hundred twenty".