2660165971 has 2 divisors, whose sum is σ = 2660165972. Its totient is φ = 2660165970.

The previous prime is 2660165951. The next prime is 2660166043. The reversal of 2660165971 is 1795610662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2660165971 - 2⁵ = 2660165939 is a prime.

It is a zygodrome in base 6.

It is not a weakly prime, because it can be changed into another prime (2660165941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330082985 + 1330082986.

It is an arithmetic number, because the mean of its divisors is an integer number (1330082986).

Almost surely, 2^2660165971 is an apocalyptic number.

2660165971 is a deficient number, since it is larger than the sum of its proper divisors (1).

2660165971 is an equidigital number, since it uses as much as digits as its factorization.

2660165971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 2660165971 is about 51576.7968276433. The cubic root of 2660165971 is about 1385.5947991518.

The spelling of 2660165971 in words is "two billion, six hundred sixty million, one hundred sixty-five thousand, nine hundred seventy-one".