66554888113351 has 96 divisors (see below), whose sum is σ = 77964792643584. Its totient is φ = 56655111744000.

The previous prime is 66554888113339. The next prime is 66554888113391. The reversal of 66554888113351 is 15331188845566.

It is a happy number.

It is not a de Polignac number, because 66554888113351 - 2²⁵ = 66554854558919 is a prime.

It is a super-3 number, since 3×66554888113351³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66554888113321) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10959142051 + ... + 10959148123.

It is an arithmetic number, because the mean of its divisors is an integer number (812133256704).

Almost surely, 2^{66554888113351} is an apocalyptic number.

66554888113351 is a deficient number, since it is larger than the sum of its proper divisors (11409904530233).

66554888113351 is a wasteful number, since it uses less digits than its factorization.

66554888113351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6653 (or 6642 counting only the distinct ones).

The product of its digits is 82944000, while the sum is 64.

The spelling of 66554888113351 in words is "sixty-six trillion, five hundred fifty-four billion, eight hundred eighty-eight million, one hundred thirteen thousand, three hundred fifty-one".