66511581677315 has 8 divisors (see below), whose sum is σ = 79813983740208. Its totient is φ = 53209208190240.

The previous prime is 66511581677243. The next prime is 66511581677447. The reversal of 66511581677315 is 51377618511566.

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

It is a de Polignac number, because none of the positive numbers 2^k-66511581677315 is a prime.

It is a Duffinian 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, 1637501 + ... + 11649230.

It is an arithmetic number, because the mean of its divisors is an integer number (9976747967526).

Almost surely, 2^{66511581677315} is an apocalyptic number.

66511581677315 is a deficient number, since it is larger than the sum of its proper divisors (13302402062893).

66511581677315 is a wasteful number, since it uses less digits than its factorization.

66511581677315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14287909.

The product of its digits is 31752000, while the sum is 62.

The spelling of 66511581677315 in words is "sixty-six trillion, five hundred eleven billion, five hundred eighty-one million, six hundred seventy-seven thousand, three hundred fifteen".