64705887 has 48 divisors (see below), whose sum is σ = 102735360. Its totient is φ = 39108096.

The previous prime is 64705843. The next prime is 64705919. The reversal of 64705887 is 78850746.

64705887 is a `hidden beast` number, since 64 + 7 + 0 + 588 + 7 = 666.

It is not a de Polignac number, because 64705887 - 2¹⁰ = 64704863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64705087) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 667023 + ... + 667119.

It is an arithmetic number, because the mean of its divisors is an integer number (2140320).

Almost surely, 2^64705887 is an apocalyptic number.

64705887 is a deficient number, since it is larger than the sum of its proper divisors (38029473).

64705887 is a wasteful number, since it uses less digits than its factorization.

64705887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 64705887 is about 8043.9969542510. The cubic root of 64705887 is about 401.4652241586.

The spelling of 64705887 in words is "sixty-four million, seven hundred five thousand, eight hundred eighty-seven".