66611516 has 12 divisors (see below), whose sum is σ = 117880560. Its totient is φ = 32931360.

The previous prime is 66611509. The next prime is 66611533. The reversal of 66611516 is 61511666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93200 + ... + 93911.

It is an arithmetic number, because the mean of its divisors is an integer number (9823380).

Almost surely, 2^66611516 is an apocalyptic number.

It is an amenable number.

66611516 is a deficient number, since it is larger than the sum of its proper divisors (51269044).

66611516 is a wasteful number, since it uses less digits than its factorization.

66611516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187204 (or 187202 counting only the distinct ones).

The product of its digits is 6480, while the sum is 32.

The square root of 66611516 is about 8161.5878357094. The cubic root of 66611516 is about 405.3682896931.

The spelling of 66611516 in words is "sixty-six million, six hundred eleven thousand, five hundred sixteen".