64766261 has 4 divisors (see below), whose sum is σ = 74018592. Its totient is φ = 55513932.

The previous prime is 64766203. The next prime is 64766291. The reversal of 64766261 is 16266746.

64766261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 64766261 - 2⁶ = 64766197 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 (64766291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4626155 + ... + 4626168.

It is an arithmetic number, because the mean of its divisors is an integer number (18504648).

Almost surely, 2^64766261 is an apocalyptic number.

It is an amenable number.

64766261 is a deficient number, since it is larger than the sum of its proper divisors (9252331).

64766261 is an equidigital number, since it uses as much as digits as its factorization.

64766261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9252330.

The product of its digits is 72576, while the sum is 38.

The square root of 64766261 is about 8047.7488156627. The cubic root of 64766261 is about 401.5900480760.

The spelling of 64766261 in words is "sixty-four million, seven hundred sixty-six thousand, two hundred sixty-one".