64915521166 has 8 divisors (see below), whose sum is σ = 97377298560. Its totient is φ = 32456421648.

The previous prime is 64915521157. The next prime is 64915521191. The reversal of 64915521166 is 66112551946.

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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 607726 + ... + 706513.

It is an arithmetic number, because the mean of its divisors is an integer number (12172162320).

Almost surely, 2^64915521166 is an apocalyptic number.

64915521166 is a deficient number, since it is larger than the sum of its proper divisors (32461777394).

64915521166 is a wasteful number, since it uses less digits than its factorization.

64915521166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338938.

The product of its digits is 388800, while the sum is 46.

The spelling of 64915521166 in words is "sixty-four billion, nine hundred fifteen million, five hundred twenty-one thousand, one hundred sixty-six".