66072677 has 16 divisors (see below), whose sum is σ = 73651200. Its totient is φ = 58771440.

The previous prime is 66072661. The next prime is 66072697. The reversal of 66072677 is 77627066.

It is a cyclic number.

It is not a de Polignac number, because 66072677 - 2⁴ = 66072661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66072637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120518 + ... + 121064.

It is an arithmetic number, because the mean of its divisors is an integer number (4603200).

Almost surely, 2^66072677 is an apocalyptic number.

It is an amenable number.

66072677 is a deficient number, since it is larger than the sum of its proper divisors (7578523).

66072677 is a wasteful number, since it uses less digits than its factorization.

66072677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776.

The product of its (nonzero) digits is 148176, while the sum is 41.

The square root of 66072677 is about 8128.5101340898. The cubic root of 66072677 is about 404.2722836081.

It can be divided in two parts, 660 and 72677, that added together give a palindrome (73337).

The spelling of 66072677 in words is "sixty-six million, seventy-two thousand, six hundred seventy-seven".