64166563 has 2 divisors, whose sum is σ = 64166564. Its totient is φ = 64166562.

The previous prime is 64166549. The next prime is 64166579. The reversal of 64166563 is 36566146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64166563 - 2¹³ = 64158371 is a prime.

It is equal to p_3794356 and since 64166563 and 3794356 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (64166513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32083281 + 32083282.

It is an arithmetic number, because the mean of its divisors is an integer number (32083282).

Almost surely, 2^64166563 is an apocalyptic number.

64166563 is a deficient number, since it is larger than the sum of its proper divisors (1).

64166563 is an equidigital number, since it uses as much as digits as its factorization.

64166563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 37.

The square root of 64166563 is about 8010.4034230493. The cubic root of 64166563 is about 400.3467056512.

The spelling of 64166563 in words is "sixty-four million, one hundred sixty-six thousand, five hundred sixty-three".