66155002055001 has 24 divisors (see below), whose sum is σ = 96454958708160. Its totient is φ = 43689036118176.

The previous prime is 66155002054927. The next prime is 66155002055039. The reversal of 66155002055001 is 10055020055166.

It is not a de Polignac number, because 66155002055001 - 2⁹ = 66155002054489 is a prime.

It is a super-2 number, since 2×66155002055001² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66155002055101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18336291 + ... + 21645543.

It is an arithmetic number, because the mean of its divisors is an integer number (4018956612840).

Almost surely, 2^{66155002055001} is an apocalyptic number.

It is an amenable number.

66155002055001 is a deficient number, since it is larger than the sum of its proper divisors (30299956653159).

66155002055001 is a wasteful number, since it uses less digits than its factorization.

66155002055001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3330125 (or 3330122 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The spelling of 66155002055001 in words is "sixty-six trillion, one hundred fifty-five billion, two million, fifty-five thousand, one".