66333722187166 has 16 divisors (see below), whose sum is σ = 113868829134720. Its totient is φ = 28390268876760.

The previous prime is 66333722187163. The next prime is 66333722187191. The reversal of 66333722187166 is 66178122733366.

It is a super-2 number, since 2×66333722187166² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66333722187163) 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, 3205756240 + ... + 3205776931.

It is an arithmetic number, because the mean of its divisors is an integer number (7116801820920).

Almost surely, 2^{66333722187166} is an apocalyptic number.

66333722187166 is a deficient number, since it is larger than the sum of its proper divisors (47535106947554).

66333722187166 is a wasteful number, since it uses less digits than its factorization.

66333722187166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6411533919.

The product of its digits is 54867456, while the sum is 61.

The spelling of 66333722187166 in words is "sixty-six trillion, three hundred thirty-three billion, seven hundred twenty-two million, one hundred eighty-seven thousand, one hundred sixty-six".