86666644 has 12 divisors (see below), whose sum is σ = 153930784. Its totient is φ = 42686424.

The previous prime is 86666641. The next prime is 86666677. The reversal of 86666644 is 44666668.

It is a super-2 number, since 2×86666644² = 15022214364445472, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 86666594 and 86666603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86666641) 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 3 ways as a sum of consecutive naturals, for example, 161424 + ... + 161959.

Almost surely, 2^86666644 is an apocalyptic number.

It is an amenable number.

86666644 is a deficient number, since it is larger than the sum of its proper divisors (67264140).

86666644 is a wasteful number, since it uses less digits than its factorization.

86666644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323454 (or 323452 counting only the distinct ones).

The product of its digits is 995328, while the sum is 46.

The square root of 86666644 is about 9309.4921451173. The cubic root of 86666644 is about 442.5380928403.

It can be divided in two parts, 8666664 and 4, that added together give a palindrome (8666668).

The spelling of 86666644 in words is "eighty-six million, six hundred sixty-six thousand, six hundred forty-four".