85125666 has 16 divisors (see below), whose sum is σ = 170517600. Its totient is φ = 28330848.

The previous prime is 85125661. The next prime is 85125709. The reversal of 85125666 is 66652158.

It is not an unprimeable number, because it can be changed into a prime (85125661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6811 + ... + 14718.

It is an arithmetic number, because the mean of its divisors is an integer number (10657350).

Almost surely, 2^85125666 is an apocalyptic number.

85125666 is an abundant number, since it is smaller than the sum of its proper divisors (85391934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85125666 is a wasteful number, since it uses less digits than its factorization.

85125666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22193.

The product of its digits is 86400, while the sum is 39.

The square root of 85125666 is about 9226.3571359448. The cubic root of 85125666 is about 439.8995397370.

It can be divided in two parts, 85 and 125666, that added together give a triangular number (125751 = T₅₀₁).

The spelling of 85125666 in words is "eighty-five million, one hundred twenty-five thousand, six hundred sixty-six".