66270755 has 4 divisors (see below), whose sum is σ = 79524912. Its totient is φ = 53016600.

The previous prime is 66270749. The next prime is 66270779. The reversal of 66270755 is 55707266.

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

It is not a de Polignac number, because 66270755 - 2¹⁶ = 66205219 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6627071 + ... + 6627080.

It is an arithmetic number, because the mean of its divisors is an integer number (19881228).

Almost surely, 2^66270755 is an apocalyptic number.

66270755 is a deficient number, since it is larger than the sum of its proper divisors (13254157).

66270755 is a wasteful number, since it uses less digits than its factorization.

66270755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13254156.

The product of its (nonzero) digits is 88200, while the sum is 38.

The square root of 66270755 is about 8140.6851677239. The cubic root of 66270755 is about 404.6758672635.

It can be divided in two parts, 662 and 70755, that added together give a palindrome (71417).

The spelling of 66270755 in words is "sixty-six million, two hundred seventy thousand, seven hundred fifty-five".