64461087666 has 24 divisors (see below), whose sum is σ = 142913730960. Its totient is φ = 20987330616.

The previous prime is 64461087629. The next prime is 64461087667. The reversal of 64461087666 is 66678016446.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (64461087667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41640756 + ... + 41642303.

It is an arithmetic number, because the mean of its divisors is an integer number (5954738790).

Almost surely, 2^64461087666 is an apocalyptic number.

64461087666 is an abundant number, since it is smaller than the sum of its proper divisors (78452643294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64461087666 is a wasteful number, since it uses less digits than its factorization.

64461087666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83283110 (or 83283107 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 54.

The spelling of 64461087666 in words is "sixty-four billion, four hundred sixty-one million, eighty-seven thousand, six hundred sixty-six".