6672681561 has 16 divisors (see below), whose sum is σ = 10950041984. Its totient is φ = 3519656064.

The previous prime is 6672681553. The next prime is 6672681599. The reversal of 6672681561 is 1651862766.

It is not a de Polignac number, because 6672681561 - 2³ = 6672681553 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6672681561.

It is not an unprimeable number, because it can be changed into a prime (6672681361) 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, 12220756 + ... + 12221301.

It is an arithmetic number, because the mean of its divisors is an integer number (684377624).

Almost surely, 2^6672681561 is an apocalyptic number.

It is an amenable number.

6672681561 is a deficient number, since it is larger than the sum of its proper divisors (4277360423).

6672681561 is a wasteful number, since it uses less digits than its factorization.

6672681561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24442080.

The product of its digits is 725760, while the sum is 48.

The square root of 6672681561 is about 81686.4833433292. The cubic root of 6672681561 is about 1882.6379108466.

The spelling of 6672681561 in words is "six billion, six hundred seventy-two million, six hundred eighty-one thousand, five hundred sixty-one".