6577670661 has 4 divisors (see below), whose sum is σ = 8770227552. Its totient is φ = 4385113772.

The previous prime is 6577670657. The next prime is 6577670669. The reversal of 6577670661 is 1660767756.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6577670661 - 2² = 6577670657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6577670669) 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, 1096278441 + ... + 1096278446.

It is an arithmetic number, because the mean of its divisors is an integer number (2192556888).

Almost surely, 2^6577670661 is an apocalyptic number.

It is an amenable number.

6577670661 is a deficient number, since it is larger than the sum of its proper divisors (2192556891).

6577670661 is a wasteful number, since it uses less digits than its factorization.

6577670661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192556890.

The product of its (nonzero) digits is 2222640, while the sum is 51.

The square root of 6577670661 is about 81102.8400304206. The cubic root of 6577670661 is about 1873.6596677356.

The spelling of 6577670661 in words is "six billion, five hundred seventy-seven million, six hundred seventy thousand, six hundred sixty-one".