66874727 has 4 divisors (see below), whose sum is σ = 67971096. Its totient is φ = 65778360.

The previous prime is 66874723. The next prime is 66874739. The reversal of 66874727 is 72747866.

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

It is a cyclic number.

It is not a de Polignac number, because 66874727 - 2² = 66874723 is a prime.

It is a super-2 number, since 2×66874727² = 8944458222649058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66874723) 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, 548093 + ... + 548214.

It is an arithmetic number, because the mean of its divisors is an integer number (16992774).

Almost surely, 2^66874727 is an apocalyptic number.

66874727 is a deficient number, since it is larger than the sum of its proper divisors (1096369).

66874727 is a wasteful number, since it uses less digits than its factorization.

66874727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096368.

The product of its digits is 790272, while the sum is 47.

The square root of 66874727 is about 8177.6969251740. The cubic root of 66874727 is about 405.9015166339.

The spelling of 66874727 in words is "sixty-six million, eight hundred seventy-four thousand, seven hundred twenty-seven".