64365666 has 8 divisors (see below), whose sum is σ = 128731344. Its totient is φ = 21455220.

The previous prime is 64365649. The next prime is 64365683. The reversal of 64365666 is 66656346.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (64365649) and next prime (64365683).

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

64365666 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5363800 + ... + 5363811.

It is an arithmetic number, because the mean of its divisors is an integer number (16091418).

Almost surely, 2^64365666 is an apocalyptic number.

64365666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

64365666 is a wasteful number, since it uses less digits than its factorization.

64365666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10727616.

The product of its digits is 466560, while the sum is 42.

The square root of 64365666 is about 8022.8215734865. The cubic root of 64365666 is about 400.7603578905.

The spelling of 64365666 in words is "sixty-four million, three hundred sixty-five thousand, six hundred sixty-six".