66115834 has 4 divisors (see below), whose sum is σ = 99173754. Its totient is φ = 33057916.

The previous prime is 66115807. The next prime is 66115837. The reversal of 66115834 is 43851166.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 41563809 + 24552025 = 6447^2 + 4955^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66115834.

It is not an unprimeable number, because it can be changed into a prime (66115837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16528957 + ... + 16528960.

Almost surely, 2^66115834 is an apocalyptic number.

66115834 is a deficient number, since it is larger than the sum of its proper divisors (33057920).

66115834 is a wasteful number, since it uses less digits than its factorization.

66115834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33057919.

The product of its digits is 17280, while the sum is 34.

The square root of 66115834 is about 8131.1643692647. The cubic root of 66115834 is about 404.3602845914.

The spelling of 66115834 in words is "sixty-six million, one hundred fifteen thousand, eight hundred thirty-four".