66425878 has 8 divisors (see below), whose sum is σ = 102331872. Its totient is φ = 32315256.

The previous prime is 66425869. The next prime is 66425903. The reversal of 66425878 is 87852466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 448750 + ... + 448897.

It is an arithmetic number, because the mean of its divisors is an integer number (12791484).

Almost surely, 2^66425878 is an apocalyptic number.

66425878 is a deficient number, since it is larger than the sum of its proper divisors (35905994).

66425878 is a wasteful number, since it uses less digits than its factorization.

66425878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897686.

The product of its digits is 645120, while the sum is 46.

The square root of 66425878 is about 8150.2072366290. The cubic root of 66425878 is about 404.9913690179.

The spelling of 66425878 in words is "sixty-six million, four hundred twenty-five thousand, eight hundred seventy-eight".