64668005 has 8 divisors (see below), whose sum is σ = 79252992. Its totient is φ = 50633488.

The previous prime is 64667989. The next prime is 64668011. The reversal of 64668005 is 50086646.

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 64668005 - 2⁴ = 64667989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137357 + ... + 137826.

It is an arithmetic number, because the mean of its divisors is an integer number (9906624).

Almost surely, 2^64668005 is an apocalyptic number.

It is an amenable number.

64668005 is a deficient number, since it is larger than the sum of its proper divisors (14584987).

64668005 is a wasteful number, since it uses less digits than its factorization.

64668005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275235.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 64668005 is about 8041.6419343316. The cubic root of 64668005 is about 401.3868630533.

The spelling of 64668005 in words is "sixty-four million, six hundred sixty-eight thousand, five".