66155165051 has 8 divisors (see below), whose sum is σ = 68059568304. Its totient is φ = 64264612480.

The previous prime is 66155165047. The next prime is 66155165099. The reversal of 66155165051 is 15056155166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66155165051 - 2² = 66155165047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66155165551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3452981 + ... + 3472086.

It is an arithmetic number, because the mean of its divisors is an integer number (8507446038).

Almost surely, 2^66155165051 is an apocalyptic number.

66155165051 is a deficient number, since it is larger than the sum of its proper divisors (1904403253).

66155165051 is a wasteful number, since it uses less digits than its factorization.

66155165051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6925341.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 66155165051 in words is "sixty-six billion, one hundred fifty-five million, one hundred sixty-five thousand, fifty-one".