66042615 has 8 divisors (see below), whose sum is σ = 105668208. Its totient is φ = 35222720.

The previous prime is 66042601. The next prime is 66042619. The reversal of 66042615 is 51624066.

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

It is not a de Polignac number, because 66042615 - 2⁵ = 66042583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66042619) 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, 2201406 + ... + 2201435.

It is an arithmetic number, because the mean of its divisors is an integer number (13208526).

Almost surely, 2^66042615 is an apocalyptic number.

66042615 is a deficient number, since it is larger than the sum of its proper divisors (39625593).

66042615 is a wasteful number, since it uses less digits than its factorization.

66042615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4402849.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 66042615 is about 8126.6607533476. The cubic root of 66042615 is about 404.2109618556.

The spelling of 66042615 in words is "sixty-six million, forty-two thousand, six hundred fifteen".