6817877680 has 20 divisors (see below), whose sum is σ = 15851565792. Its totient is φ = 2727151040.

The previous prime is 6817877629. The next prime is 6817877683. The reversal of 6817877680 is 867787186.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (6817877683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42611656 + ... + 42611815.

Almost surely, 2^6817877680 is an apocalyptic number.

It is an amenable number.

6817877680 is an abundant number, since it is smaller than the sum of its proper divisors (9033688112).

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

6817877680 is a wasteful number, since it uses less digits than its factorization.

6817877680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85223484 (or 85223478 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 58.

The square root of 6817877680 is about 82570.4407157913. The cubic root of 6817877680 is about 1896.1953115277.

The spelling of 6817877680 in words is "six billion, eight hundred seventeen million, eight hundred seventy-seven thousand, six hundred eighty".