66117611 has 6 divisors (see below), whose sum is σ = 76912380. Its totient is φ = 56672196.

The previous prime is 66117599. The next prime is 66117613. The reversal of 66117611 is 11671166.

It is a de Polignac number, because none of the positive numbers 2^k-66117611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66117613) 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 5 ways as a sum of consecutive naturals, for example, 674621 + ... + 674718.

It is an arithmetic number, because the mean of its divisors is an integer number (12818730).

Almost surely, 2^66117611 is an apocalyptic number.

66117611 is a deficient number, since it is larger than the sum of its proper divisors (10794769).

66117611 is a wasteful number, since it uses less digits than its factorization.

66117611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349353 (or 1349346 counting only the distinct ones).

The product of its digits is 1512, while the sum is 29.

The square root of 66117611 is about 8131.2736394737. The cubic root of 66117611 is about 404.3639072323.

Adding to 66117611 its reverse (11671166), we get a palindrome (77788777).

The spelling of 66117611 in words is "sixty-six million, one hundred seventeen thousand, six hundred eleven".