64966563 has 8 divisors (see below), whose sum is σ = 96246800. Its totient is φ = 43311024.

The previous prime is 64966553. The next prime is 64966579. The reversal of 64966563 is 36566946.

It is not a de Polignac number, because 64966563 - 2⁴ = 64966547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64966553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1203058 + ... + 1203111.

It is an arithmetic number, because the mean of its divisors is an integer number (12030850).

Almost surely, 2^64966563 is an apocalyptic number.

64966563 is a deficient number, since it is larger than the sum of its proper divisors (31280237).

64966563 is a wasteful number, since it uses less digits than its factorization.

64966563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406178 (or 2406172 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The square root of 64966563 is about 8060.1838068372. The cubic root of 64966563 is about 402.0036199273.

The spelling of 64966563 in words is "sixty-four million, nine hundred sixty-six thousand, five hundred sixty-three".