85550566 has 8 divisors (see below), whose sum is σ = 129525480. Its totient is φ = 42375408.

The previous prime is 85550561. The next prime is 85550567. The reversal of 85550566 is 66505558.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85550561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199671 + ... + 200098.

It is an arithmetic number, because the mean of its divisors is an integer number (16190685).

Almost surely, 2^85550566 is an apocalyptic number.

85550566 is a deficient number, since it is larger than the sum of its proper divisors (43974914).

85550566 is a wasteful number, since it uses less digits than its factorization.

85550566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399878.

The product of its (nonzero) digits is 180000, while the sum is 40.

The square root of 85550566 is about 9249.3548964239. The cubic root of 85550566 is about 440.6302366529.

The spelling of 85550566 in words is "eighty-five million, five hundred fifty thousand, five hundred sixty-six".