67856625 has 24 divisors (see below), whose sum is σ = 122324904. Its totient is φ = 36189600.

The previous prime is 67856611. The next prime is 67856627. The reversal of 67856625 is 52665876.

67856625 is a `hidden beast` number, since 67 + 8 + 566 + 25 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 19289664 + 48566961 = 4392^2 + 6969^2 .

It is not a de Polignac number, because 67856625 - 2⁶ = 67856561 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67856627) 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, 29034 + ... + 31283.

It is an arithmetic number, because the mean of its divisors is an integer number (5096871).

Almost surely, 2^67856625 is an apocalyptic number.

It is an amenable number.

67856625 is a deficient number, since it is larger than the sum of its proper divisors (54468279).

67856625 is a wasteful number, since it uses less digits than its factorization.

67856625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60338 (or 60325 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 67856625 is about 8237.5132776828. The cubic root of 67856625 is about 407.8784420166.

The spelling of 67856625 in words is "sixty-seven million, eight hundred fifty-six thousand, six hundred twenty-five".