64681166 has 8 divisors (see below), whose sum is σ = 105841944. Its totient is φ = 29400520.

The previous prime is 64681163. The next prime is 64681189. The reversal of 64681166 is 66118646.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64681163) 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 in 3 ways as a sum of consecutive naturals, for example, 1470005 + ... + 1470048.

It is an arithmetic number, because the mean of its divisors is an integer number (13230243).

Almost surely, 2^64681166 is an apocalyptic number.

64681166 is a deficient number, since it is larger than the sum of its proper divisors (41160778).

64681166 is a wasteful number, since it uses less digits than its factorization.

64681166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2940066.

The product of its digits is 41472, while the sum is 38.

The square root of 64681166 is about 8042.4601957361. The cubic root of 64681166 is about 401.4140908103.

The spelling of 64681166 in words is "sixty-four million, six hundred eighty-one thousand, one hundred sixty-six".