66065516 has 24 divisors (see below), whose sum is σ = 127177680. Its totient is φ = 30027360.

The previous prime is 66065513. The next prime is 66065533. The reversal of 66065516 is 61556066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66065513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 881 + ... + 11528.

It is an arithmetic number, because the mean of its divisors is an integer number (5299070).

Almost surely, 2^66065516 is an apocalyptic number.

It is an amenable number.

66065516 is a deficient number, since it is larger than the sum of its proper divisors (61112164).

66065516 is a wasteful number, since it uses less digits than its factorization.

66065516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12446 (or 12422 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 66065516 is about 8128.0696355285. The cubic root of 66065516 is about 404.2576779821.

The spelling of 66065516 in words is "sixty-six million, sixty-five thousand, five hundred sixteen".