85481666 has 4 divisors (see below), whose sum is σ = 128222502. Its totient is φ = 42740832.

The previous prime is 85481659. The next prime is 85481677. The reversal of 85481666 is 66618458.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 43943641 + 41538025 = 6629^2 + 6445^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21370415 + ... + 21370418.

Almost surely, 2^85481666 is an apocalyptic number.

85481666 is a deficient number, since it is larger than the sum of its proper divisors (42740836).

85481666 is a wasteful number, since it uses less digits than its factorization.

85481666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42740835.

The product of its digits is 276480, while the sum is 44.

The square root of 85481666 is about 9245.6295621229. The cubic root of 85481666 is about 440.5119145167.

The spelling of 85481666 in words is "eighty-five million, four hundred eighty-one thousand, six hundred sixty-six".