56667778899 has 8 divisors (see below), whose sum is σ = 75567349200. Its totient is φ = 37773363936.

The previous prime is 56667778891. The next prime is 56667778931. The reversal of 56667778899 is 99887776665.

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

It is not a de Polignac number, because 56667778899 - 2³ = 56667778891 is a prime.

It is a super-2 number, since 2×56667778899² (a number of 22 digits) contains 22 as substring.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (56667778891) 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, 1263112 + ... + 1307205.

It is an arithmetic number, because the mean of its divisors is an integer number (9445918650).

Almost surely, 2^56667778899 is an apocalyptic number.

56667778899 is a deficient number, since it is larger than the sum of its proper divisors (18899570301).

56667778899 is a wasteful number, since it uses less digits than its factorization.

56667778899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577669.

The product of its digits is 1920360960, while the sum is 78.

The spelling of 56667778899 in words is "fifty-six billion, six hundred sixty-seven million, seven hundred seventy-eight thousand, eight hundred ninety-nine".