660606051651 has 32 divisors (see below), whose sum is σ = 1084146685440. Its totient is φ = 348427367424.

The previous prime is 660606051617. The next prime is 660606051673. The reversal of 660606051651 is 156150606066.

It is not a de Polignac number, because 660606051651 - 2⁹ = 660606051139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660606050651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4270995 + ... + 4422963.

It is an arithmetic number, because the mean of its divisors is an integer number (33879583920).

Almost surely, 2^660606051651 is an apocalyptic number.

660606051651 is a deficient number, since it is larger than the sum of its proper divisors (423540633789).

660606051651 is a wasteful number, since it uses less digits than its factorization.

660606051651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167915.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 660606051651 in words is "six hundred sixty billion, six hundred six million, fifty-one thousand, six hundred fifty-one".