6712921685 has 16 divisors (see below), whose sum is σ = 8115100032. Its totient is φ = 5330664000.

The previous prime is 6712921679. The next prime is 6712921741. The reversal of 6712921685 is 5861292176.

It is a happy number.

It is not a de Polignac number, because 6712921685 - 2¹⁶ = 6712856149 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 1311902 + ... + 1317008.

It is an arithmetic number, because the mean of its divisors is an integer number (507193752).

Almost surely, 2^6712921685 is an apocalyptic number.

It is an amenable number.

6712921685 is a deficient number, since it is larger than the sum of its proper divisors (1402178347).

6712921685 is a wasteful number, since it uses less digits than its factorization.

6712921685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7004.

The product of its digits is 362880, while the sum is 47.

The square root of 6712921685 is about 81932.4214520723. The cubic root of 6712921685 is about 1886.4147934052.

The spelling of 6712921685 in words is "six billion, seven hundred twelve million, nine hundred twenty-one thousand, six hundred eighty-five".