66570077 has 12 divisors (see below), whose sum is σ = 77839200. Its totient is φ = 56765016.

The previous prime is 66570059. The next prime is 66570103. The reversal of 66570077 is 77007566.

It is not a de Polignac number, because 66570077 - 2⁸ = 66569821 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66570077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66570017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6338 + ... + 13164.

It is an arithmetic number, because the mean of its divisors is an integer number (6486600).

Almost surely, 2^66570077 is an apocalyptic number.

It is an amenable number.

66570077 is a deficient number, since it is larger than the sum of its proper divisors (11269123).

66570077 is a wasteful number, since it uses less digits than its factorization.

66570077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7040 (or 7033 counting only the distinct ones).

The product of its (nonzero) digits is 61740, while the sum is 38.

The square root of 66570077 is about 8159.0487803420. The cubic root of 66570077 is about 405.2842124338.

The spelling of 66570077 in words is "sixty-six million, five hundred seventy thousand, seventy-seven".