64667461 has 2 divisors, whose sum is σ = 64667462. Its totient is φ = 64667460.

The previous prime is 64667429. The next prime is 64667501. The reversal of 64667461 is 16476646.

It is a happy number.

It is an a-pointer prime, because the next prime (64667501) can be obtained adding 64667461 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45360225 + 19307236 = 6735^2 + 4394^2 .

It is a cyclic number.

It is not a de Polignac number, because 64667461 - 2⁵ = 64667429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64662461) 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 as a sum of consecutive naturals, namely, 32333730 + 32333731.

It is an arithmetic number, because the mean of its divisors is an integer number (32333731).

Almost surely, 2^64667461 is an apocalyptic number.

It is an amenable number.

64667461 is a deficient number, since it is larger than the sum of its proper divisors (1).

64667461 is an equidigital number, since it uses as much as digits as its factorization.

64667461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 40.

The square root of 64667461 is about 8041.6081103222. The cubic root of 64667461 is about 401.3857375350.

The spelling of 64667461 in words is "sixty-four million, six hundred sixty-seven thousand, four hundred sixty-one".