671667756612 has 48 divisors (see below), whose sum is σ = 1659473065152. Its totient is φ = 210711854080.

The previous prime is 671667756587. The next prime is 671667756619. The reversal of 671667756612 is 216657766176.

It is a super-2 number, since 2×671667756612² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (671667756619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9913483 + ... + 9981005.

It is an arithmetic number, because the mean of its divisors is an integer number (34572355524).

Almost surely, 2^671667756612 is an apocalyptic number.

It is an amenable number.

671667756612 is an abundant number, since it is smaller than the sum of its proper divisors (987805308540).

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

671667756612 is a wasteful number, since it uses less digits than its factorization.

671667756612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116308 (or 116306 counting only the distinct ones).

The product of its digits is 26671680, while the sum is 60.

The spelling of 671667756612 in words is "six hundred seventy-one billion, six hundred sixty-seven million, seven hundred fifty-six thousand, six hundred twelve".