66587774145 has 16 divisors (see below), whose sum is σ = 111172632192. Its totient is φ = 33969415040.

The previous prime is 66587774131. The next prime is 66587774153. The reversal of 66587774145 is 54147778566.

It is not a de Polignac number, because 66587774145 - 2⁷ = 66587774017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96503676 + ... + 96504365.

It is an arithmetic number, because the mean of its divisors is an integer number (6948289512).

Almost surely, 2^66587774145 is an apocalyptic number.

It is an amenable number.

66587774145 is a deficient number, since it is larger than the sum of its proper divisors (44584858047).

66587774145 is a wasteful number, since it uses less digits than its factorization.

66587774145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193008072.

The product of its digits is 39513600, while the sum is 60.

The spelling of 66587774145 in words is "sixty-six billion, five hundred eighty-seven million, seven hundred seventy-four thousand, one hundred forty-five".