66511316 has 6 divisors (see below), whose sum is σ = 116394810. Its totient is φ = 33255656.

The previous prime is 66511283. The next prime is 66511363. The reversal of 66511316 is 61311566.

It can be written as a sum of positive squares in only one way, i.e., 60528400 + 5982916 = 7780^2 + 2446^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8313911 + ... + 8313918.

It is an arithmetic number, because the mean of its divisors is an integer number (19399135).

Almost surely, 2^66511316 is an apocalyptic number.

It is an amenable number.

66511316 is a deficient number, since it is larger than the sum of its proper divisors (49883494).

66511316 is a wasteful number, since it uses less digits than its factorization.

66511316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16627833 (or 16627831 counting only the distinct ones).

The product of its digits is 3240, while the sum is 29.

The square root of 66511316 is about 8155.4470141127. The cubic root of 66511316 is about 405.1649300314.

The spelling of 66511316 in words is "sixty-six million, five hundred eleven thousand, three hundred sixteen".