20660601331 has 2 divisors, whose sum is σ = 20660601332. Its totient is φ = 20660601330.

The previous prime is 20660601317. The next prime is 20660601371. The reversal of 20660601331 is 13310606602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20660601331 - 2³³ = 12070666739 is a prime.

It is a super-2 number, since 2×20660601331² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20660601331.

It is not a weakly prime, because it can be changed into another prime (20660601301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10330300665 + 10330300666.

It is an arithmetic number, because the mean of its divisors is an integer number (10330300666).

Almost surely, 2^20660601331 is an apocalyptic number.

20660601331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20660601331 is an equidigital number, since it uses as much as digits as its factorization.

20660601331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 20660601331 in words is "twenty billion, six hundred sixty million, six hundred one thousand, three hundred thirty-one".