87666744 has 64 divisors (see below), whose sum is σ = 240912000. Its totient is φ = 26363520.

The previous prime is 87666721. The next prime is 87666751. The reversal of 87666744 is 44766678.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 87666693 and 87666702.

It is a congruent number.

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, 35502 + ... + 37890.

It is an arithmetic number, because the mean of its divisors is an integer number (3764250).

Almost surely, 2^87666744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87666744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120456000).

87666744 is an abundant number, since it is smaller than the sum of its proper divisors (153245256).

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

87666744 is a wasteful number, since it uses less digits than its factorization.

87666744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548 (or 2544 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 48.

The square root of 87666744 is about 9363.0520665005. The cubic root of 87666744 is about 444.2338270027.

It can be divided in two parts, 8766674 and 4, that added together give a palindrome (8766678).

The spelling of 87666744 in words is "eighty-seven million, six hundred sixty-six thousand, seven hundred forty-four".