55166722033885 has 32 divisors (see below), whose sum is σ = 83934048614400. Its totient is φ = 33806769552960.

The previous prime is 55166722033817. The next prime is 55166722033919. The reversal of 55166722033885 is 58833022766155.

It is not a de Polignac number, because 55166722033885 - 2⁷ = 55166722033757 is a prime.

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, 1214300905 + ... + 1214346334.

It is an arithmetic number, because the mean of its divisors is an integer number (2622939019200).

Almost surely, 2^{55166722033885} is an apocalyptic number.

55166722033885 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55166722033885 is a deficient number, since it is larger than the sum of its proper divisors (28767326580515).

55166722033885 is a wasteful number, since it uses less digits than its factorization.

55166722033885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2428647321.

The product of its (nonzero) digits is 72576000, while the sum is 61.

It can be divided in two parts, 5516672 and 2033885, that added together give a palindrome (7550557).

The spelling of 55166722033885 in words is "fifty-five trillion, one hundred sixty-six billion, seven hundred twenty-two million, thirty-three thousand, eight hundred eighty-five".