66507065 has 8 divisors (see below), whose sum is σ = 79868040. Its totient is φ = 53165952.

The previous prime is 66507031. The next prime is 66507107. The reversal of 66507065 is 56070566.

It can be written as a sum of positive squares in 4 ways, for example, as 182329 + 66324736 = 427^2 + 8144^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66507065 - 2⁸ = 66506809 is a prime.

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, 3821 + ... + 12149.

It is an arithmetic number, because the mean of its divisors is an integer number (9983505).

Almost surely, 2^66507065 is an apocalyptic number.

It is an amenable number.

66507065 is a deficient number, since it is larger than the sum of its proper divisors (13360975).

66507065 is a wasteful number, since it uses less digits than its factorization.

66507065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9931.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 66507065 is about 8155.1863865886. The cubic root of 66507065 is about 405.1562979523.

The spelling of 66507065 in words is "sixty-six million, five hundred seven thousand, sixty-five".