64165806 has 48 divisors (see below), whose sum is σ = 145650960. Its totient is φ = 20388480.

The previous prime is 64165799. The next prime is 64165813. The reversal of 64165806 is 60856146.

64165806 is a `hidden beast` number, since 64 + 16 + 580 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (64165799) and next prime (64165813).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42586 + ... + 44066.

It is an arithmetic number, because the mean of its divisors is an integer number (3034395).

Almost surely, 2^64165806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64165806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72825480).

64165806 is an abundant number, since it is smaller than the sum of its proper divisors (81485154).

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

64165806 is a wasteful number, since it uses less digits than its factorization.

64165806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601 (or 1598 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 64165806 is about 8010.3561718565. The cubic root of 64165806 is about 400.3451312920.

The spelling of 64165806 in words is "sixty-four million, one hundred sixty-five thousand, eight hundred six".