66156605415115 has 8 divisors (see below), whose sum is σ = 79388048090448. Its totient is φ = 52925203270560.

The previous prime is 66156605415059. The next prime is 66156605415149. The reversal of 66156605415115 is 51151450665166.

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-66156605415115 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, 6417921 + ... + 13172050.

It is an arithmetic number, because the mean of its divisors is an integer number (9923506011306).

Almost surely, 2^{66156605415115} is an apocalyptic number.

66156605415115 is a deficient number, since it is larger than the sum of its proper divisors (13231442675333).

66156605415115 is a wasteful number, since it uses less digits than its factorization.

66156605415115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20265389.

The product of its (nonzero) digits is 3240000, while the sum is 52.

The spelling of 66156605415115 in words is "sixty-six trillion, one hundred fifty-six billion, six hundred five million, four hundred fifteen thousand, one hundred fifteen".