85768666 has 4 divisors (see below), whose sum is σ = 128653002. Its totient is φ = 42884332.

The previous prime is 85768663. The next prime is 85768691. The reversal of 85768666 is 66686758.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66686758 = 2 ⋅33343379.

It can be written as a sum of positive squares in only one way, i.e., 83192641 + 2576025 = 9121^2 + 1605^2 .

It is not an unprimeable number, because it can be changed into a prime (85768663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21442165 + ... + 21442168.

Almost surely, 2^85768666 is an apocalyptic number.

85768666 is a deficient number, since it is larger than the sum of its proper divisors (42884336).

85768666 is a wasteful number, since it uses less digits than its factorization.

85768666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42884335.

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

The square root of 85768666 is about 9261.1374031487. The cubic root of 85768666 is about 441.0043619939.

The spelling of 85768666 in words is "eighty-five million, seven hundred sixty-eight thousand, six hundred sixty-six".