6557660995 has 4 divisors (see below), whose sum is σ = 7869193200. Its totient is φ = 5246128792.

The previous prime is 6557660959. The next prime is 6557660999. The reversal of 6557660995 is 5990667556.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6557660995 - 2⁷ = 6557660867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6557660999) 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, 655766095 + ... + 655766104.

It is an arithmetic number, because the mean of its divisors is an integer number (1967298300).

Almost surely, 2^6557660995 is an apocalyptic number.

6557660995 is a deficient number, since it is larger than the sum of its proper divisors (1311532205).

6557660995 is a wasteful number, since it uses less digits than its factorization.

6557660995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311532204.

The product of its (nonzero) digits is 15309000, while the sum is 58.

The square root of 6557660995 is about 80979.3862350166. The cubic root of 6557660995 is about 1871.7578097988.

The spelling of 6557660995 in words is "six billion, five hundred fifty-seven million, six hundred sixty thousand, nine hundred ninety-five".