66465653 has 16 divisors (see below), whose sum is σ = 72164736. Its totient is φ = 61047360.

The previous prime is 66465617. The next prime is 66465673. The reversal of 66465653 is 35656466.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 66465653 - 2⁶ = 66465589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66465653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66465613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70163 + ... + 71103.

It is an arithmetic number, because the mean of its divisors is an integer number (4510296).

Almost surely, 2^66465653 is an apocalyptic number.

It is an amenable number.

66465653 is a deficient number, since it is larger than the sum of its proper divisors (5699083).

66465653 is a wasteful number, since it uses less digits than its factorization.

66465653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084.

The product of its digits is 388800, while the sum is 41.

The square root of 66465653 is about 8152.6469934617. The cubic root of 66465653 is about 405.0721875084.

The spelling of 66465653 in words is "sixty-six million, four hundred sixty-five thousand, six hundred fifty-three".