30660640686685 has 16 divisors (see below), whose sum is σ = 37787355169200. Its totient is φ = 23865461554176.

The previous prime is 30660640686677. The next prime is 30660640686691. The reversal of 30660640686685 is 58668604606603.

It can be written as a sum of positive squares in 8 ways, for example, as 2164976760996 + 28495663925689 = 1471386^2 + 5338133^2 .

It is a cyclic number.

It is not a de Polignac number, because 30660640686685 - 2³ = 30660640686677 is a prime.

It is a congruent number.

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, 65963071 + ... + 66426259.

It is an arithmetic number, because the mean of its divisors is an integer number (2361709698075).

Almost surely, 2^{30660640686685} is an apocalyptic number.

It is an amenable number.

30660640686685 is a deficient number, since it is larger than the sum of its proper divisors (7126714482515).

30660640686685 is a wasteful number, since it uses less digits than its factorization.

30660640686685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821040.

The product of its (nonzero) digits is 179159040, while the sum is 64.

The spelling of 30660640686685 in words is "thirty trillion, six hundred sixty billion, six hundred forty million, six hundred eighty-six thousand, six hundred eighty-five".