64666653 has 8 divisors (see below), whose sum is σ = 86314368. Its totient is φ = 43065024.

The previous prime is 64666643. The next prime is 64666661. The reversal of 64666653 is 35666646.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64666653 - 2⁵ = 64666621 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64666643) 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, 8101 + ... + 13962.

It is an arithmetic number, because the mean of its divisors is an integer number (10789296).

Almost surely, 2^64666653 is an apocalyptic number.

It is an amenable number.

64666653 is a deficient number, since it is larger than the sum of its proper divisors (21647715).

64666653 is a wasteful number, since it uses less digits than its factorization.

64666653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23043.

The product of its digits is 466560, while the sum is 42.

The square root of 64666653 is about 8041.5578714575. The cubic root of 64666653 is about 401.3840657977.

The spelling of 64666653 in words is "sixty-four million, six hundred sixty-six thousand, six hundred fifty-three".