55667777999 has 8 divisors (see below), whose sum is σ = 56633713920. Its totient is φ = 54702589336.

The previous prime is 55667777993. The next prime is 55667778013. The reversal of 55667777999 is 99977776655.

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 55667777999 - 2²⁰ = 55666729423 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55667777993) 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, 35477 + ... + 335550.

It is an arithmetic number, because the mean of its divisors is an integer number (7079214240).

Almost surely, 2^55667777999 is an apocalyptic number.

55667777999 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

55667777999 is a deficient number, since it is larger than the sum of its proper divisors (965935921).

55667777999 is a wasteful number, since it uses less digits than its factorization.

55667777999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373629.

The product of its digits is 1575296100, while the sum is 77.

The spelling of 55667777999 in words is "fifty-five billion, six hundred sixty-seven million, seven hundred seventy-seven thousand, nine hundred ninety-nine".