66406115 has 8 divisors (see below), whose sum is σ = 79766208. Its totient is φ = 53072320.

The previous prime is 66406079. The next prime is 66406163. The reversal of 66406115 is 51160466.

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

It is not a de Polignac number, because 66406115 - 2⁶ = 66406051 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506 + ... + 11535.

It is an arithmetic number, because the mean of its divisors is an integer number (9970776).

Almost surely, 2^66406115 is an apocalyptic number.

66406115 is a deficient number, since it is larger than the sum of its proper divisors (13360093).

66406115 is a wasteful number, since it uses less digits than its factorization.

66406115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13149.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 66406115 is about 8148.9947232772. The cubic root of 66406115 is about 404.9512007453.

The spelling of 66406115 in words is "sixty-six million, four hundred six thousand, one hundred fifteen".