66850115 has 8 divisors (see below), whose sum is σ = 81319488. Its totient is φ = 52747200.

The previous prime is 66850093. The next prime is 66850117. The reversal of 66850115 is 51105866.

It is a happy number.

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

It is not a de Polignac number, because 66850115 - 2⁸ = 66849859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66850117) 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, 91211 + ... + 91940.

It is an arithmetic number, because the mean of its divisors is an integer number (10164936).

Almost surely, 2^66850115 is an apocalyptic number.

66850115 is a deficient number, since it is larger than the sum of its proper divisors (14469373).

66850115 is a wasteful number, since it uses less digits than its factorization.

66850115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183229.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 66850115 is about 8176.1919620322. The cubic root of 66850115 is about 405.8517156883.

The spelling of 66850115 in words is "sixty-six million, eight hundred fifty thousand, one hundred fifteen".