66615122160 has 120 divisors (see below), whose sum is σ = 226780563984. Its totient is φ = 17520675840.

The previous prime is 66615122113. The next prime is 66615122207. The reversal of 66615122160 is 6122151666.

It is an interprime number because it is at equal distance from previous prime (66615122113) and next prime (66615122207).

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 581146 + ... + 686265.

Almost surely, 2^66615122160 is an apocalyptic number.

66615122160 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66615122160 is an abundant number, since it is smaller than the sum of its proper divisors (160165441824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66615122160 is a wasteful number, since it uses less digits than its factorization.

66615122160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1267503 (or 1267494 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 66615122160 in words is "sixty-six billion, six hundred fifteen million, one hundred twenty-two thousand, one hundred sixty".