20661366316 has 12 divisors (see below), whose sum is σ = 36158646160. Its totient is φ = 10330324560.

The previous prime is 20661366307. The next prime is 20661366317. The reversal of 20661366316 is 61366316602.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20661366317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72625 + ... + 215863.

Almost surely, 2^20661366316 is an apocalyptic number.

It is an amenable number.

20661366316 is a deficient number, since it is larger than the sum of its proper divisors (15497279844).

20661366316 is a wasteful number, since it uses less digits than its factorization.

20661366316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179304 (or 179302 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 40.

The spelling of 20661366316 in words is "twenty billion, six hundred sixty-one million, three hundred sixty-six thousand, three hundred sixteen".