20664075763 has 8 divisors (see below), whose sum is σ = 20953460528. Its totient is φ = 20374861824.

The previous prime is 20664075749. The next prime is 20664075779. The reversal of 20664075763 is 36757046602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20664075763 - 2²¹ = 20661978611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20664075463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211420 + ... + 293302.

It is an arithmetic number, because the mean of its divisors is an integer number (2619182566).

Almost surely, 2^20664075763 is an apocalyptic number.

20664075763 is a deficient number, since it is larger than the sum of its proper divisors (289384765).

20664075763 is an equidigital number, since it uses as much as digits as its factorization.

20664075763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85413.

The product of its (nonzero) digits is 1270080, while the sum is 46.

The spelling of 20664075763 in words is "twenty billion, six hundred sixty-four million, seventy-five thousand, seven hundred sixty-three".