306673662640 has 40 divisors (see below), whose sum is σ = 713039764320. Its totient is φ = 122665422336.

The previous prime is 306673662637. The next prime is 306673662697. The reversal of 306673662640 is 46266376603.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4013916 + ... + 4089604.

It is an arithmetic number, because the mean of its divisors is an integer number (17825994108).

Almost surely, 2^306673662640 is an apocalyptic number.

It is an amenable number.

306673662640 is an abundant number, since it is smaller than the sum of its proper divisors (406366101680).

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

306673662640 is a wasteful number, since it uses less digits than its factorization.

306673662640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126349 (or 126343 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 49.

The spelling of 306673662640 in words is "three hundred six billion, six hundred seventy-three million, six hundred sixty-two thousand, six hundred forty".