2166662417 has 2 divisors, whose sum is σ = 2166662418. Its totient is φ = 2166662416.

The previous prime is 2166662389. The next prime is 2166662431. The reversal of 2166662417 is 7142666612.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2064430096 + 102232321 = 45436^2 + 10111^2 .

It is a cyclic number.

It is not a de Polignac number, because 2166662417 - 2⁸ = 2166662161 is a prime.

It is not a weakly prime, because it can be changed into another prime (2166662437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083331208 + 1083331209.

It is an arithmetic number, because the mean of its divisors is an integer number (1083331209).

Almost surely, 2^2166662417 is an apocalyptic number.

It is an amenable number.

2166662417 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166662417 is an equidigital number, since it uses as much as digits as its factorization.

2166662417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The square root of 2166662417 is about 46547.4211637981. The cubic root of 2166662417 is about 1293.9885001052.

The spelling of 2166662417 in words is "two billion, one hundred sixty-six million, six hundred sixty-two thousand, four hundred seventeen".