66101755 has 4 divisors (see below), whose sum is σ = 79322112. Its totient is φ = 52881400.

The previous prime is 66101753. The next prime is 66101803. The reversal of 66101755 is 55710166.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 66101755 - 2¹ = 66101753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66101753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6610171 + ... + 6610180.

It is an arithmetic number, because the mean of its divisors is an integer number (19830528).

Almost surely, 2^66101755 is an apocalyptic number.

66101755 is a deficient number, since it is larger than the sum of its proper divisors (13220357).

66101755 is a wasteful number, since it uses less digits than its factorization.

66101755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13220356.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 66101755 is about 8130.2985800031. The cubic root of 66101755 is about 404.3315804608.

The spelling of 66101755 in words is "sixty-six million, one hundred one thousand, seven hundred fifty-five".