85553966 has 4 divisors (see below), whose sum is σ = 128330952. Its totient is φ = 42776982.

The previous prime is 85553957. The next prime is 85553971. The reversal of 85553966 is 66935558.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66935558 = 2 ⋅33467779.

It is a self number, because there is not a number n which added to its sum of digits gives 85553966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21388490 + ... + 21388493.

It is an arithmetic number, because the mean of its divisors is an integer number (32082738).

Almost surely, 2^85553966 is an apocalyptic number.

85553966 is a deficient number, since it is larger than the sum of its proper divisors (42776986).

85553966 is a wasteful number, since it uses less digits than its factorization.

85553966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42776985.

The product of its digits is 972000, while the sum is 47.

The square root of 85553966 is about 9249.5386911997. The cubic root of 85553966 is about 440.6360738360.

It can be divided in two parts, 8555 and 3966, that added together give a palindrome (12521).

The spelling of 85553966 in words is "eighty-five million, five hundred fifty-three thousand, nine hundred sixty-six".