66442115 has 16 divisors (see below), whose sum is σ = 81557280. Its totient is φ = 51947520.

The previous prime is 66442109. The next prime is 66442133. The reversal of 66442115 is 51124466.

It is not a de Polignac number, because 66442115 - 2¹⁴ = 66425731 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53987 + ... + 55203.

It is an arithmetic number, because the mean of its divisors is an integer number (5097330).

Almost surely, 2^66442115 is an apocalyptic number.

66442115 is a deficient number, since it is larger than the sum of its proper divisors (15115165).

66442115 is a wasteful number, since it uses less digits than its factorization.

66442115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462.

The product of its digits is 5760, while the sum is 29.

The square root of 66442115 is about 8151.2032854052. The cubic root of 66442115 is about 405.0243647385.

The spelling of 66442115 in words is "sixty-six million, four hundred forty-two thousand, one hundred fifteen".