1557166063 has 2 divisors, whose sum is σ = 1557166064. Its totient is φ = 1557166062.

The previous prime is 1557166003. The next prime is 1557166067. The reversal of 1557166063 is 3606617551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1557166063 - 2⁹ = 1557165551 is a prime.

It is a super-2 number, since 2×1557166063² = 4849532295517839938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1557166067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 778583031 + 778583032.

It is an arithmetic number, because the mean of its divisors is an integer number (778583032).

Almost surely, 2^1557166063 is an apocalyptic number.

1557166063 is a deficient number, since it is larger than the sum of its proper divisors (1).

1557166063 is an equidigital number, since it uses as much as digits as its factorization.

1557166063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 1557166063 is about 39460.9435138087. The cubic root of 1557166063 is about 1159.0752794328.

The spelling of 1557166063 in words is "one billion, five hundred fifty-seven million, one hundred sixty-six thousand, sixty-three".