66244863 has 8 divisors (see below), whose sum is σ = 88376368. Its totient is φ = 44138304.

The previous prime is 66244847. The next prime is 66244883. The reversal of 66244863 is 36844266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66244863 - 2⁴ = 66244847 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 (66244813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1245 + ... + 11577.

It is an arithmetic number, because the mean of its divisors is an integer number (11047046).

Almost surely, 2^66244863 is an apocalyptic number.

66244863 is a deficient number, since it is larger than the sum of its proper divisors (22131505).

66244863 is a wasteful number, since it uses less digits than its factorization.

66244863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12473.

The product of its digits is 165888, while the sum is 39.

The square root of 66244863 is about 8139.0947285309. The cubic root of 66244863 is about 404.6231580787.

The spelling of 66244863 in words is "sixty-six million, two hundred forty-four thousand, eight hundred sixty-three".