64653671 has 2 divisors, whose sum is σ = 64653672. Its totient is φ = 64653670.

The previous prime is 64653647. The next prime is 64653683. The reversal of 64653671 is 17635646.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64653671 - 2⁶ = 64653607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64653271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32326835 + 32326836.

It is an arithmetic number, because the mean of its divisors is an integer number (32326836).

Almost surely, 2^64653671 is an apocalyptic number.

64653671 is a deficient number, since it is larger than the sum of its proper divisors (1).

64653671 is an equidigital number, since it uses as much as digits as its factorization.

64653671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 38.

The square root of 64653671 is about 8040.7506490377. The cubic root of 64653671 is about 401.3572043658.

The spelling of 64653671 in words is "sixty-four million, six hundred fifty-three thousand, six hundred seventy-one".