8154966557 has 2 divisors, whose sum is σ = 8154966558. Its totient is φ = 8154966556.

The previous prime is 8154966527. The next prime is 8154966581. The reversal of 8154966557 is 7556694518.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8019918916 + 135047641 = 89554^2 + 11621^2 .

It is a cyclic number.

It is not a de Polignac number, because 8154966557 - 2¹⁸ = 8154704413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8154966527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4077483278 + 4077483279.

It is an arithmetic number, because the mean of its divisors is an integer number (4077483279).

Almost surely, 2^8154966557 is an apocalyptic number.

It is an amenable number.

8154966557 is a deficient number, since it is larger than the sum of its proper divisors (1).

8154966557 is an equidigital number, since it uses as much as digits as its factorization.

8154966557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072000, while the sum is 56.

The square root of 8154966557 is about 90304.8534520709. The cubic root of 8154966557 is about 2012.8313815229.

The spelling of 8154966557 in words is "eight billion, one hundred fifty-four million, nine hundred sixty-six thousand, five hundred fifty-seven".