64333861 has 8 divisors (see below), whose sum is σ = 68352120. Its totient is φ = 60435648.

The previous prime is 64333859. The next prime is 64333873. The reversal of 64333861 is 16833346.

64333861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 15752961 + 48580900 = 3969^2 + 6970^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64333861 - 2¹ = 64333859 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 (64333811) 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 7 ways as a sum of consecutive naturals, for example, 28906 + ... + 31051.

It is an arithmetic number, because the mean of its divisors is an integer number (8544015).

Almost surely, 2^64333861 is an apocalyptic number.

It is an amenable number.

64333861 is a deficient number, since it is larger than the sum of its proper divisors (4018259).

64333861 is a wasteful number, since it uses less digits than its factorization.

64333861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60023.

The product of its digits is 31104, while the sum is 34.

The square root of 64333861 is about 8020.8391705606. The cubic root of 64333861 is about 400.6943377902.

The spelling of 64333861 in words is "sixty-four million, three hundred thirty-three thousand, eight hundred sixty-one".