66244377 has 4 divisors (see below), whose sum is σ = 88325840. Its totient is φ = 44162916.

The previous prime is 66244369. The next prime is 66244379. The reversal of 66244377 is 77344266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66244377 - 2³ = 66244369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66244379) 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, 11040727 + ... + 11040732.

It is an arithmetic number, because the mean of its divisors is an integer number (22081460).

Almost surely, 2^66244377 is an apocalyptic number.

It is an amenable number.

66244377 is a deficient number, since it is larger than the sum of its proper divisors (22081463).

66244377 is a wasteful number, since it uses less digits than its factorization.

66244377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22081462.

The product of its digits is 169344, while the sum is 39.

The square root of 66244377 is about 8139.0648725760. The cubic root of 66244377 is about 404.6221685814.

The spelling of 66244377 in words is "sixty-six million, two hundred forty-four thousand, three hundred seventy-seven".