66516050 has 12 divisors (see below), whose sum is σ = 123719946. Its totient is φ = 26606400.

The previous prime is 66516031. The next prime is 66516071. The reversal of 66516050 is 5061566.

It can be written as a sum of positive squares in 3 ways, for example, as 52461049 + 14055001 = 7243^2 + 3749^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 665111 + ... + 665210.

Almost surely, 2^66516050 is an apocalyptic number.

66516050 is a deficient number, since it is larger than the sum of its proper divisors (57203896).

66516050 is a wasteful number, since it uses less digits than its factorization.

66516050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330333 (or 1330328 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 66516050 is about 8155.7372444188. The cubic root of 66516050 is about 405.1745424572.

The spelling of 66516050 in words is "sixty-six million, five hundred sixteen thousand, fifty".