20366072661 has 8 divisors (see below), whose sum is σ = 29623378464. Its totient is φ = 12343074320.

The previous prime is 20366072609. The next prime is 20366072669. The reversal of 20366072661 is 16627066302.

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 20366072661 - 2¹³ = 20366064469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20366072669) 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, 308576826 + ... + 308576891.

It is an arithmetic number, because the mean of its divisors is an integer number (3702922308).

Almost surely, 2^20366072661 is an apocalyptic number.

It is an amenable number.

20366072661 is a deficient number, since it is larger than the sum of its proper divisors (9257305803).

20366072661 is a wasteful number, since it uses less digits than its factorization.

20366072661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617153731.

The product of its (nonzero) digits is 108864, while the sum is 39.

The spelling of 20366072661 in words is "twenty billion, three hundred sixty-six million, seventy-two thousand, six hundred sixty-one".