64995669 has 8 divisors (see below), whose sum is σ = 96289920. Its totient is φ = 43330428.

The previous prime is 64995653. The next prime is 64995673. The reversal of 64995669 is 96659946.

It is a happy number.

It is not a de Polignac number, because 64995669 - 2⁴ = 64995653 is a prime.

It is a super-2 number, since 2×64995669² = 8448873977515122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64995629) 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, 1203597 + ... + 1203650.

It is an arithmetic number, because the mean of its divisors is an integer number (12036240).

Almost surely, 2^64995669 is an apocalyptic number.

It is an amenable number.

64995669 is a deficient number, since it is larger than the sum of its proper divisors (31294251).

64995669 is a wasteful number, since it uses less digits than its factorization.

64995669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407256 (or 2407250 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 54.

The square root of 64995669 is about 8061.9891466064. The cubic root of 64995669 is about 402.0636455256.

The spelling of 64995669 in words is "sixty-four million, nine hundred ninety-five thousand, six hundred sixty-nine".