66701585 has 8 divisors (see below), whose sum is σ = 80099880. Its totient is φ = 53322624.

The previous prime is 66701573. The next prime is 66701597. The reversal of 66701585 is 58510766.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66701573) and next prime (66701597).

It can be written as a sum of positive squares in 4 ways, for example, as 620944 + 66080641 = 788^2 + 8129^2 .

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 66701585 - 2⁶ = 66701521 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, 4349 + ... + 12341.

It is an arithmetic number, because the mean of its divisors is an integer number (10012485).

Almost surely, 2^66701585 is an apocalyptic number.

It is an amenable number.

66701585 is a deficient number, since it is larger than the sum of its proper divisors (13398295).

66701585 is a wasteful number, since it uses less digits than its factorization.

66701585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9667.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 66701585 is about 8167.1038318366. The cubic root of 66701585 is about 405.5509141341.

The spelling of 66701585 in words is "sixty-six million, seven hundred one thousand, five hundred eighty-five".