66464653 has 4 divisors (see below), whose sum is σ = 66481408. Its totient is φ = 66447900.

The previous prime is 66464639. The next prime is 66464677. The reversal of 66464653 is 35646466.

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 66464653 - 2⁹ = 66464141 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 (66464623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1300 + ... + 11602.

It is an arithmetic number, because the mean of its divisors is an integer number (16620352).

Almost surely, 2^66464653 is an apocalyptic number.

It is an amenable number.

66464653 is a deficient number, since it is larger than the sum of its proper divisors (16755).

66464653 is a wasteful number, since it uses less digits than its factorization.

66464653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16754.

The product of its digits is 311040, while the sum is 40.

The square root of 66464653 is about 8152.5856634567. The cubic root of 66464653 is about 405.0701560120.

The spelling of 66464653 in words is "sixty-six million, four hundred sixty-four thousand, six hundred fifty-three".