66015198 has 24 divisors (see below), whose sum is σ = 149252688. Its totient is φ = 21048192.

The previous prime is 66015181. The next prime is 66015217. The reversal of 66015198 is 89151066.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79315 + ... + 80142.

It is an arithmetic number, because the mean of its divisors is an integer number (6218862).

Almost surely, 2^66015198 is an apocalyptic number.

66015198 is an abundant number, since it is smaller than the sum of its proper divisors (83237490).

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

66015198 is a wasteful number, since it uses less digits than its factorization.

66015198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159488 (or 159485 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 66015198 is about 8124.9737230344. The cubic root of 66015198 is about 404.1550192602.

The spelling of 66015198 in words is "sixty-six million, fifteen thousand, one hundred ninety-eight".