85047666 has 32 divisors (see below), whose sum is σ = 187308288. Its totient is φ = 25529040.

The previous prime is 85047661. The next prime is 85047673. The reversal of 85047666 is 66674058.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (85047661) 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 in 15 ways as a sum of consecutive naturals, for example, 1041 + ... + 13083.

It is an arithmetic number, because the mean of its divisors is an integer number (5853384).

Almost surely, 2^85047666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85047666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93654144).

85047666 is an abundant number, since it is smaller than the sum of its proper divisors (102260622).

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

85047666 is a wasteful number, since it uses less digits than its factorization.

85047666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12166.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 85047666 is about 9222.1291467860. The cubic root of 85047666 is about 439.7651398118.

It can be divided in two parts, 850 and 47666, that added together give a triangular number (48516 = T₃₁₁).

The spelling of 85047666 in words is "eighty-five million, forty-seven thousand, six hundred sixty-six".