1172557667 has 4 divisors (see below), whose sum is σ = 1212990720. Its totient is φ = 1132124616.

The previous prime is 1172557657. The next prime is 1172557679. The reversal of 1172557667 is 7667552711.

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 1172557667 - 2²⁸ = 904122211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1172557657) 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, 20216483 + ... + 20216540.

It is an arithmetic number, because the mean of its divisors is an integer number (303247680).

Almost surely, 2^1172557667 is an apocalyptic number.

1172557667 is a deficient number, since it is larger than the sum of its proper divisors (40433053).

1172557667 is an equidigital number, since it uses as much as digits as its factorization.

1172557667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40433052.

The product of its digits is 617400, while the sum is 47.

The square root of 1172557667 is about 34242.6293821021. The cubic root of 1172557667 is about 1054.4955149614.

The spelling of 1172557667 in words is "one billion, one hundred seventy-two million, five hundred fifty-seven thousand, six hundred sixty-seven".