20660085501 has 64 divisors (see below), whose sum is σ = 32441942016. Its totient is φ = 11564467200.

The previous prime is 20660085491. The next prime is 20660085527. The reversal of 20660085501 is 10558006602.

It is not a de Polignac number, because 20660085501 - 2⁵ = 20660085469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20660085001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15928485 + ... + 15929781.

It is an arithmetic number, because the mean of its divisors is an integer number (506905344).

Almost surely, 2^20660085501 is an apocalyptic number.

It is an amenable number.

20660085501 is a deficient number, since it is larger than the sum of its proper divisors (11781856515).

20660085501 is a wasteful number, since it uses less digits than its factorization.

20660085501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042.

The product of its (nonzero) digits is 14400, while the sum is 33.

The spelling of 20660085501 in words is "twenty billion, six hundred sixty million, eighty-five thousand, five hundred one".