64681803 has 24 divisors (see below), whose sum is σ = 97905600. Its totient is φ = 41094144.

The previous prime is 64681789. The next prime is 64681807. The reversal of 64681803 is 30818646.

It is a happy number.

64681803 is a `hidden beast` number, since 646 + 8 + 1 + 8 + 0 + 3 = 666.

It is not a de Polignac number, because 64681803 - 2⁶ = 64681739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64681807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19051 + ... + 22187.

It is an arithmetic number, because the mean of its divisors is an integer number (4079400).

Almost surely, 2^64681803 is an apocalyptic number.

64681803 is a deficient number, since it is larger than the sum of its proper divisors (33223797).

64681803 is a wasteful number, since it uses less digits than its factorization.

64681803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3251 (or 3248 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 64681803 is about 8042.4997979484. The cubic root of 64681803 is about 401.4154085557.

The spelling of 64681803 in words is "sixty-four million, six hundred eighty-one thousand, eight hundred three".