87319666 has 12 divisors (see below), whose sum is σ = 152364078. Its totient is φ = 37422672.

The previous prime is 87319663. The next prime is 87319669. The reversal of 87319666 is 66691378.

It is an interprime number because it is at equal distance from previous prime (87319663) and next prime (87319669).

It can be written as a sum of positive squares in only one way, i.e., 72335025 + 14984641 = 8505^2 + 3871^2 .

It is not an unprimeable number, because it can be changed into a prime (87319663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 445411 + ... + 445606.

Almost surely, 2^87319666 is an apocalyptic number.

87319666 is a deficient number, since it is larger than the sum of its proper divisors (65044412).

87319666 is a wasteful number, since it uses less digits than its factorization.

87319666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891033 (or 891026 counting only the distinct ones).

The product of its digits is 326592, while the sum is 46.

The square root of 87319666 is about 9344.4992375194. The cubic root of 87319666 is about 443.6468020024.

The spelling of 87319666 in words is "eighty-seven million, three hundred nineteen thousand, six hundred sixty-six".