65425878 has 48 divisors (see below), whose sum is σ = 165328800. Its totient is φ = 18691344.

The previous prime is 65425859. The next prime is 65425883. The reversal of 65425878 is 87852456.

65425878 is a `hidden beast` number, since 65 + 4 + 2 + 587 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 876 + ... + 11472.

It is an arithmetic number, because the mean of its divisors is an integer number (3444350).

Almost surely, 2^65425878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65425878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82664400).

65425878 is an abundant number, since it is smaller than the sum of its proper divisors (99902922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65425878 is a wasteful number, since it uses less digits than its factorization.

65425878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10626 (or 10609 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 65425878 is about 8088.6264594182. The cubic root of 65425878 is about 402.9487873809.

The spelling of 65425878 in words is "sixty-five million, four hundred twenty-five thousand, eight hundred seventy-eight".