64906805 has 8 divisors (see below), whose sum is σ = 81274752. Its totient is φ = 49667728.

The previous prime is 64906801. The next prime is 64906817. The reversal of 64906805 is 50860946.

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

It is a cyclic number.

It is not a de Polignac number, because 64906805 - 2² = 64906801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64906801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282089 + ... + 282318.

It is an arithmetic number, because the mean of its divisors is an integer number (10159344).

Almost surely, 2^64906805 is an apocalyptic number.

It is an amenable number.

64906805 is a deficient number, since it is larger than the sum of its proper divisors (16367947).

64906805 is a wasteful number, since it uses less digits than its factorization.

64906805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564435.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 64906805 is about 8056.4759665750. The cubic root of 64906805 is about 401.8803241855.

The spelling of 64906805 in words is "sixty-four million, nine hundred six thousand, eight hundred five".