66545516 has 12 divisors (see below), whose sum is σ = 116516232. Its totient is φ = 33255168.

The previous prime is 66545503. The next prime is 66545533. The reversal of 66545516 is 61554566.

It is a self number, because there is not a number n which added to its sum of digits gives 66545516.

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, 7991 + ... + 14033.

It is an arithmetic number, because the mean of its divisors is an integer number (9709686).

Almost surely, 2^66545516 is an apocalyptic number.

It is an amenable number.

66545516 is a deficient number, since it is larger than the sum of its proper divisors (49970716).

66545516 is a wasteful number, since it uses less digits than its factorization.

66545516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8800 (or 8798 counting only the distinct ones).

The product of its digits is 108000, while the sum is 38.

The square root of 66545516 is about 8157.5435027954. The cubic root of 66545516 is about 405.2343631599.

The spelling of 66545516 in words is "sixty-six million, five hundred forty-five thousand, five hundred sixteen".