6556157999 has 8 divisors (see below), whose sum is σ = 6595830000. Its totient is φ = 6516520192.

The previous prime is 6556157989. The next prime is 6556158053. The reversal of 6556157999 is 9997516556.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6556157999 - 2²⁰ = 6555109423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6556157989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449087 + ... + 463455.

It is an arithmetic number, because the mean of its divisors is an integer number (824478750).

Almost surely, 2^6556157999 is an apocalyptic number.

6556157999 is a deficient number, since it is larger than the sum of its proper divisors (39672001).

6556157999 is a wasteful number, since it uses less digits than its factorization.

6556157999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17097.

The product of its digits is 22963500, while the sum is 62.

The square root of 6556157999 is about 80970.1055884207. The cubic root of 6556157999 is about 1871.6147984690.

The spelling of 6556157999 in words is "six billion, five hundred fifty-six million, one hundred fifty-seven thousand, nine hundred ninety-nine".