64667825 has 24 divisors (see below), whose sum is σ = 83566080. Its totient is φ = 49582400.

The previous prime is 64667821. The next prime is 64667831. The reversal of 64667825 is 52876646.

64667825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64667825 - 2² = 64667821 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (64667821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138242 + ... + 138708.

It is an arithmetic number, because the mean of its divisors is an integer number (3481920).

Almost surely, 2^64667825 is an apocalyptic number.

It is an amenable number.

64667825 is a deficient number, since it is larger than the sum of its proper divisors (18898255).

64667825 is a wasteful number, since it uses less digits than its factorization.

64667825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697 (or 692 counting only the distinct ones).

The product of its digits is 483840, while the sum is 44.

The square root of 64667825 is about 8041.6307425795. The cubic root of 64667825 is about 401.3864906398.

The spelling of 64667825 in words is "sixty-four million, six hundred sixty-seven thousand, eight hundred twenty-five".