55991155663366 has 64 divisors (see below), whose sum is σ = 106446957811200. Its totient is φ = 21454084776960.

The previous prime is 55991155663279. The next prime is 55991155663379. The reversal of 55991155663366 is 66336655119955.

It is a super-3 number, since 3×55991155663366³ (a number of 42 digits) contains 333 as substring.

It is a pancake number, because a pancake can be divided into 55991155663366 parts by 10582169 straight cuts.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 55991155663295 and 55991155663304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1898710 + ... + 10751158.

It is an arithmetic number, because the mean of its divisors is an integer number (1663233715800).

Almost surely, 2^{55991155663366} is an apocalyptic number.

55991155663366 is a deficient number, since it is larger than the sum of its proper divisors (50455802147834).

55991155663366 is a wasteful number, since it uses less digits than its factorization.

55991155663366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8853149.

The product of its digits is 590490000, while the sum is 70.

The spelling of 55991155663366 in words is "fifty-five trillion, nine hundred ninety-one billion, one hundred fifty-five million, six hundred sixty-three thousand, three hundred sixty-six".