87666780 has 48 divisors (see below), whose sum is σ = 248240160. Its totient is φ = 23113728.

The previous prime is 87666763. The next prime is 87666793. The reversal of 87666780 is 8766678.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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, 2869 + ... + 13548.

It is an arithmetic number, because the mean of its divisors is an integer number (5171670).

Almost surely, 2^87666780 is an apocalyptic number.

It is an amenable number.

87666780 is an abundant number, since it is smaller than the sum of its proper divisors (160573380).

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

87666780 is a wasteful number, since it uses less digits than its factorization.

87666780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16518 (or 16516 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The square root of 87666780 is about 9363.0539889504. The cubic root of 87666780 is about 444.2338878103.

The spelling of 87666780 in words is "eighty-seven million, six hundred sixty-six thousand, seven hundred eighty".