66244855 has 8 divisors (see below), whose sum is σ = 81185472. Its totient is φ = 51868128.

The previous prime is 66244847. The next prime is 66244883. The reversal of 66244855 is 55844266.

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

It is a cyclic number.

It is not a de Polignac number, because 66244855 - 2³ = 66244847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140712 + ... + 141181.

It is an arithmetic number, because the mean of its divisors is an integer number (10148184).

Almost surely, 2^66244855 is an apocalyptic number.

66244855 is a deficient number, since it is larger than the sum of its proper divisors (14940617).

66244855 is a wasteful number, since it uses less digits than its factorization.

66244855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281945.

The product of its digits is 230400, while the sum is 40.

The square root of 66244855 is about 8139.0942370758. The cubic root of 66244855 is about 404.6231417907.

The spelling of 66244855 in words is "sixty-six million, two hundred forty-four thousand, eight hundred fifty-five".