64866653 has 4 divisors (see below), whose sum is σ = 65834880. Its totient is φ = 63898428.

The previous prime is 64866631. The next prime is 64866667. The reversal of 64866653 is 35666846.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64866653 - 2⁸ = 64866397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64866673) 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 in 3 ways as a sum of consecutive naturals, for example, 484013 + ... + 484146.

It is an arithmetic number, because the mean of its divisors is an integer number (16458720).

Almost surely, 2^64866653 is an apocalyptic number.

It is an amenable number.

64866653 is a deficient number, since it is larger than the sum of its proper divisors (968227).

64866653 is an equidigital number, since it uses as much as digits as its factorization.

64866653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968226.

The product of its digits is 622080, while the sum is 44.

The square root of 64866653 is about 8053.9836726927. The cubic root of 64866653 is about 401.7974380265.

The spelling of 64866653 in words is "sixty-four million, eight hundred sixty-six thousand, six hundred fifty-three".