66425390 has 8 divisors (see below), whose sum is σ = 119565720. Its totient is φ = 26570152.

The previous prime is 66425369. The next prime is 66425413. The reversal of 66425390 is 9352466.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66425390.

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, 3321260 + ... + 3321279.

It is an arithmetic number, because the mean of its divisors is an integer number (14945715).

Almost surely, 2^66425390 is an apocalyptic number.

66425390 is a deficient number, since it is larger than the sum of its proper divisors (53140330).

66425390 is a wasteful number, since it uses less digits than its factorization.

66425390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6642546.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 66425390 is about 8150.1772986850. The cubic root of 66425390 is about 404.9903772545.

The spelling of 66425390 in words is "sixty-six million, four hundred twenty-five thousand, three hundred ninety".