85491660 has 48 divisors (see below), whose sum is σ = 242274816. Its totient is φ = 22521792.

The previous prime is 85491647. The next prime is 85491671. The reversal of 85491660 is 6619458.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3604 + ... + 13563.

It is an arithmetic number, because the mean of its divisors is an integer number (5047392).

Almost surely, 2^85491660 is an apocalyptic number.

It is an amenable number.

85491660 is an abundant number, since it is smaller than the sum of its proper divisors (156783156).

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

85491660 is a wasteful number, since it uses less digits than its factorization.

85491660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17262 (or 17260 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 85491660 is about 9246.1700179047. The cubic root of 85491660 is about 440.5290811784.

The spelling of 85491660 in words is "eighty-five million, four hundred ninety-one thousand, six hundred sixty".