66168755 has 8 divisors (see below), whose sum is σ = 80009424. Its totient is φ = 52530400.

The previous prime is 66168737. The next prime is 66168779. The reversal of 66168755 is 55786166.

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

It is not a de Polignac number, because 66168755 - 2⁸ = 66168499 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49856 + ... + 51165.

It is an arithmetic number, because the mean of its divisors is an integer number (10001178).

Almost surely, 2^66168755 is an apocalyptic number.

66168755 is a deficient number, since it is larger than the sum of its proper divisors (13840669).

66168755 is a wasteful number, since it uses less digits than its factorization.

66168755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101157.

The product of its digits is 302400, while the sum is 44.

The square root of 66168755 is about 8134.4179263178. The cubic root of 66168755 is about 404.4681429886.

The spelling of 66168755 in words is "sixty-six million, one hundred sixty-eight thousand, seven hundred fifty-five".