64688407 has 8 divisors (see below), whose sum is σ = 77820800. Its totient is φ = 52528824.

The previous prime is 64688401. The next prime is 64688441. The reversal of 64688407 is 70488646.

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 64688407 - 2³ = 64688399 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 (64688401) 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, 243057 + ... + 243322.

It is an arithmetic number, because the mean of its divisors is an integer number (9727600).

Almost surely, 2^64688407 is an apocalyptic number.

64688407 is a deficient number, since it is larger than the sum of its proper divisors (13132393).

64688407 is a wasteful number, since it uses less digits than its factorization.

64688407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486405.

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 64688407 is about 8042.9103563325. The cubic root of 64688407 is about 401.4290695702.

The spelling of 64688407 in words is "sixty-four million, six hundred eighty-eight thousand, four hundred seven".