66225838615 has 8 divisors (see below), whose sum is σ = 79479487728. Its totient is φ = 52975016640.

The previous prime is 66225838589. The next prime is 66225838631. The reversal of 66225838615 is 51683852266.

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

It is not a de Polignac number, because 66225838615 - 2¹³ = 66225830423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 654901 + ... + 749230.

It is an arithmetic number, because the mean of its divisors is an integer number (9934935966).

Almost surely, 2^66225838615 is an apocalyptic number.

66225838615 is a deficient number, since it is larger than the sum of its proper divisors (13253649113).

66225838615 is a wasteful number, since it uses less digits than its factorization.

66225838615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1413569.

The product of its digits is 4147200, while the sum is 52.

The spelling of 66225838615 in words is "sixty-six billion, two hundred twenty-five million, eight hundred thirty-eight thousand, six hundred fifteen".