85549966 has 4 divisors (see below), whose sum is σ = 128324952. Its totient is φ = 42774982.

The previous prime is 85549963. The next prime is 85549979. The reversal of 85549966 is 66994558.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66994558 = 2 ⋅33497279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85549963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21387490 + ... + 21387493.

It is an arithmetic number, because the mean of its divisors is an integer number (32081238).

Almost surely, 2^85549966 is an apocalyptic number.

85549966 is a deficient number, since it is larger than the sum of its proper divisors (42774986).

85549966 is a wasteful number, since it uses less digits than its factorization.

85549966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42774985.

The product of its digits is 2332800, while the sum is 52.

The square root of 85549966 is about 9249.3224616725. The cubic root of 85549966 is about 440.6292065457.

The spelling of 85549966 in words is "eighty-five million, five hundred forty-nine thousand, nine hundred sixty-six".