85786666 has 16 divisors (see below), whose sum is σ = 149259456. Its totient is φ = 36216576.

The previous prime is 85786663. The next prime is 85786667. The reversal of 85786666 is 66668758.

It is not an unprimeable number, because it can be changed into a prime (85786661) 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, 44791 + ... + 46666.

It is an arithmetic number, because the mean of its divisors is an integer number (9328716).

Almost surely, 2^85786666 is an apocalyptic number.

85786666 is a deficient number, since it is larger than the sum of its proper divisors (63472790).

85786666 is a wasteful number, since it uses less digits than its factorization.

85786666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91533.

The product of its digits is 2903040, while the sum is 52.

The square root of 85786666 is about 9262.1091550467. The cubic root of 85786666 is about 441.0352105685.

The spelling of 85786666 in words is "eighty-five million, seven hundred eighty-six thousand, six hundred sixty-six".