66650085 has 12 divisors (see below), whose sum is σ = 115526892. Its totient is φ = 35546688.

The previous prime is 66650069. The next prime is 66650137. The reversal of 66650085 is 58005666.

It can be written as a sum of positive squares in 2 ways, for example, as 14333796 + 52316289 = 3786^2 + 7233^2 .

It is not a de Polignac number, because 66650085 - 2⁴ = 66650069 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 740512 + ... + 740601.

It is an arithmetic number, because the mean of its divisors is an integer number (9627241).

Almost surely, 2^66650085 is an apocalyptic number.

It is an amenable number.

66650085 is a deficient number, since it is larger than the sum of its proper divisors (48876807).

66650085 is a wasteful number, since it uses less digits than its factorization.

66650085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481124 (or 1481121 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 66650085 is about 8163.9503305691. The cubic root of 66650085 is about 405.4465125686.

The spelling of 66650085 in words is "sixty-six million, six hundred fifty thousand, eighty-five".