55667777998 has 12 divisors (see below), whose sum is σ = 97134592392. Its totient is φ = 23857619100.

The previous prime is 55667777993. The next prime is 55667778013. The reversal of 55667777998 is 89977776655.

It is a super-2 number, since 2×55667777998² (a number of 22 digits) contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 284019178 + ... + 284019373.

It is an arithmetic number, because the mean of its divisors is an integer number (8094549366).

Almost surely, 2^55667777998 is an apocalyptic number.

55667777998 is a deficient number, since it is larger than the sum of its proper divisors (41466814394).

55667777998 is a wasteful number, since it uses less digits than its factorization.

55667777998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568038567 (or 568038560 counting only the distinct ones).

The product of its digits is 1400263200, while the sum is 76.

The spelling of 55667777998 in words is "fifty-five billion, six hundred sixty-seven million, seven hundred seventy-seven thousand, nine hundred ninety-eight".