66025398 has 8 divisors (see below), whose sum is σ = 132050808. Its totient is φ = 22008464.

The previous prime is 66025397. The next prime is 66025409. The reversal of 66025398 is 89352066.

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

66025398 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66025391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5502111 + ... + 5502122.

It is an arithmetic number, because the mean of its divisors is an integer number (16506351).

Almost surely, 2^66025398 is an apocalyptic number.

66025398 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66025398 is a wasteful number, since it uses less digits than its factorization.

66025398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11004238.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 66025398 is about 8125.6013931278. The cubic root of 66025398 is about 404.1758335021.

The spelling of 66025398 in words is "sixty-six million, twenty-five thousand, three hundred ninety-eight".