66587228015 has 32 divisors (see below), whose sum is σ = 101309944320. Its totient is φ = 40805366400.

The previous prime is 66587228009. The next prime is 66587228021. The reversal of 66587228015 is 51082278566.

It is an interprime number because it is at equal distance from previous prime (66587228009) and next prime (66587228021).

It is not a de Polignac number, because 66587228015 - 2²⁴ = 66570450799 is a prime.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1442996 + ... + 1488425.

It is an arithmetic number, because the mean of its divisors is an integer number (3165935760).

Almost surely, 2^66587228015 is an apocalyptic number.

66587228015 is a deficient number, since it is larger than the sum of its proper divisors (34722716305).

66587228015 is a wasteful number, since it uses less digits than its factorization.

66587228015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2931503.

The product of its (nonzero) digits is 1612800, while the sum is 50.

The spelling of 66587228015 in words is "sixty-six billion, five hundred eighty-seven million, two hundred twenty-eight thousand, fifteen".