64685427 has 8 divisors (see below), whose sum is σ = 86334864. Its totient is φ = 43079808.

The previous prime is 64685393. The next prime is 64685429. The reversal of 64685427 is 72458646.

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

It is not a de Polignac number, because 64685427 - 2⁶ = 64685363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64685429) 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, 7338 + ... + 13535.

It is an arithmetic number, because the mean of its divisors is an integer number (10791858).

Almost surely, 2^64685427 is an apocalyptic number.

64685427 is a deficient number, since it is larger than the sum of its proper divisors (21649437).

64685427 is a wasteful number, since it uses less digits than its factorization.

64685427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21909.

The product of its digits is 322560, while the sum is 42.

The square root of 64685427 is about 8042.7250978757. The cubic root of 64685427 is about 401.4229052663.

The spelling of 64685427 in words is "sixty-four million, six hundred eighty-five thousand, four hundred twenty-seven".