66353061615 has 16 divisors (see below), whose sum is σ = 106397217888. Its totient is φ = 35310859776.

The previous prime is 66353061613. The next prime is 66353061659. The reversal of 66353061615 is 51616035366.

It is not a de Polignac number, because 66353061615 - 2¹ = 66353061613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66353061613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4832902 + ... + 4846611.

It is an arithmetic number, because the mean of its divisors is an integer number (6649826118).

Almost surely, 2^66353061615 is an apocalyptic number.

66353061615 is a deficient number, since it is larger than the sum of its proper divisors (40044156273).

66353061615 is a wasteful number, since it uses less digits than its factorization.

66353061615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9679978.

The product of its (nonzero) digits is 291600, while the sum is 42.

The spelling of 66353061615 in words is "sixty-six billion, three hundred fifty-three million, sixty-one thousand, six hundred fifteen".