66515016 has 32 divisors (see below), whose sum is σ = 176070240. Its totient is φ = 20867328.

The previous prime is 66514963. The next prime is 66515021. The reversal of 66515016 is 61051566.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81106 + ... + 81921.

It is an arithmetic number, because the mean of its divisors is an integer number (5502195).

Almost surely, 2^66515016 is an apocalyptic number.

It is an amenable number.

66515016 is an abundant number, since it is smaller than the sum of its proper divisors (109555224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66515016 is a wasteful number, since it uses less digits than its factorization.

66515016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163053 (or 163049 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 66515016 is about 8155.6738532141. The cubic root of 66515016 is about 405.1724429506.

The spelling of 66515016 in words is "sixty-six million, five hundred fifteen thousand, sixteen".