66415189 has 8 divisors (see below), whose sum is σ = 67469472. Its totient is φ = 65367120.

The previous prime is 66415187. The next prime is 66415199. The reversal of 66415189 is 98151466.

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

It is a cyclic number.

It is not a de Polignac number, because 66415189 - 2¹ = 66415187 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66415187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22954 + ... + 25684.

It is an arithmetic number, because the mean of its divisors is an integer number (8433684).

Almost surely, 2^66415189 is an apocalyptic number.

It is an amenable number.

66415189 is a deficient number, since it is larger than the sum of its proper divisors (1054283).

66415189 is a wasteful number, since it uses less digits than its factorization.

66415189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3107.

The product of its digits is 51840, while the sum is 40.

The square root of 66415189 is about 8149.5514600498. The cubic root of 66415189 is about 404.9696446283.

The spelling of 66415189 in words is "sixty-six million, four hundred fifteen thousand, one hundred eighty-nine".