671660115720 has 128 divisors (see below), whose sum is σ = 2244929955840. Its totient is φ = 159362282240.

The previous prime is 671660115683. The next prime is 671660115743. The reversal of 671660115720 is 27511066176.

It is a super-2 number, since 2×671660115720² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5351082 + ... + 5475161.

It is an arithmetic number, because the mean of its divisors is an integer number (17538515280).

Almost surely, 2^671660115720 is an apocalyptic number.

671660115720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

671660115720 is an abundant number, since it is smaller than the sum of its proper divisors (1573269840120).

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

671660115720 is a wasteful number, since it uses less digits than its factorization.

671660115720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10826315 (or 10826311 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 42.

The spelling of 671660115720 in words is "six hundred seventy-one billion, six hundred sixty million, one hundred fifteen thousand, seven hundred twenty".