66042699 has 8 divisors (see below), whose sum is σ = 88445760. Its totient is φ = 43834056.

The previous prime is 66042659. The next prime is 66042703. The reversal of 66042699 is 99624066.

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

It is not a de Polignac number, because 66042699 - 2²⁰ = 64994123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66042699.

It is not an unprimeable number, because it can be changed into a prime (66042619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47809 + ... + 49170.

It is an arithmetic number, because the mean of its divisors is an integer number (11055720).

Almost surely, 2^66042699 is an apocalyptic number.

66042699 is a deficient number, since it is larger than the sum of its proper divisors (22403061).

66042699 is a wasteful number, since it uses less digits than its factorization.

66042699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97209.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 66042699 is about 8126.6659215203. The cubic root of 66042699 is about 404.2111332283.

The spelling of 66042699 in words is "sixty-six million, forty-two thousand, six hundred ninety-nine".