20660362665 has 16 divisors (see below), whose sum is σ = 33075544128. Its totient is φ = 11012538816.

The previous prime is 20660362663. The next prime is 20660362669. The reversal of 20660362665 is 56626306602.

It is not a de Polignac number, because 20660362665 - 2¹ = 20660362663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20660362663) 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 15 ways as a sum of consecutive naturals, for example, 368002 + ... + 420411.

It is an arithmetic number, because the mean of its divisors is an integer number (2067221508).

Almost surely, 2^20660362665 is an apocalyptic number.

It is an amenable number.

20660362665 is a deficient number, since it is larger than the sum of its proper divisors (12415181463).

20660362665 is a wasteful number, since it uses less digits than its factorization.

20660362665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790168.

The product of its (nonzero) digits is 466560, while the sum is 42.

The spelling of 20660362665 in words is "twenty billion, six hundred sixty million, three hundred sixty-two thousand, six hundred sixty-five".