2166952477 has 2 divisors, whose sum is σ = 2166952478. Its totient is φ = 2166952476.

The previous prime is 2166952409. The next prime is 2166952493. The reversal of 2166952477 is 7742596612.

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., 2159367961 + 7584516 = 46469^2 + 2754^2 .

It is a cyclic number.

It is not a de Polignac number, because 2166952477 - 2¹⁵ = 2166919709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2166952477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166952577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083476238 + 1083476239.

It is an arithmetic number, because the mean of its divisors is an integer number (1083476239).

Almost surely, 2^2166952477 is an apocalyptic number.

It is an amenable number.

2166952477 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166952477 is an equidigital number, since it uses as much as digits as its factorization.

2166952477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 49.

The square root of 2166952477 is about 46550.5368067867. The cubic root of 2166952477 is about 1294.0462413810.

The spelling of 2166952477 in words is "two billion, one hundred sixty-six million, nine hundred fifty-two thousand, four hundred seventy-seven".