12557332667 has 8 divisors (see below), whose sum is σ = 13699858752. Its totient is φ = 11414965000.

The previous prime is 12557332663. The next prime is 12557332679. The reversal of 12557332667 is 76623375521.

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 12557332667 - 2² = 12557332663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12557332661) 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, 178292 + ... + 238542.

It is an arithmetic number, because the mean of its divisors is an integer number (1712482344).

Almost surely, 2^12557332667 is an apocalyptic number.

12557332667 is a deficient number, since it is larger than the sum of its proper divisors (1142526085).

12557332667 is a wasteful number, since it uses less digits than its factorization.

12557332667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79209.

The product of its digits is 1587600, while the sum is 47.

The spelling of 12557332667 in words is "twelve billion, five hundred fifty-seven million, three hundred thirty-two thousand, six hundred sixty-seven".