87665763 has 16 divisors (see below), whose sum is σ = 121637376. Its totient is φ = 56116320.

The previous prime is 87665741. The next prime is 87665779. The reversal of 87665763 is 36756678.

It is not a de Polignac number, because 87665763 - 2¹⁰ = 87664739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87665363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1608 + ... + 13338.

It is an arithmetic number, because the mean of its divisors is an integer number (7602336).

Almost surely, 2^87665763 is an apocalyptic number.

87665763 is a deficient number, since it is larger than the sum of its proper divisors (33971613).

87665763 is a wasteful number, since it uses less digits than its factorization.

87665763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11834.

The product of its digits is 1270080, while the sum is 48.

The square root of 87665763 is about 9362.9996795899. Note that the first 3 decimals coincide. The cubic root of 87665763 is about 444.2321699889.

The spelling of 87665763 in words is "eighty-seven million, six hundred sixty-five thousand, seven hundred sixty-three".