87240666 has 32 divisors (see below), whose sum is σ = 184089600. Its totient is φ = 27486000.

The previous prime is 87240563. The next prime is 87240667. The reversal of 87240666 is 66604278.

It is a super-2 number, since 2×87240666² = 15221867608247112, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (87240667) 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, 85105 + ... + 86123.

It is an arithmetic number, because the mean of its divisors is an integer number (5752800).

Almost surely, 2^87240666 is an apocalyptic number.

87240666 is an abundant number, since it is smaller than the sum of its proper divisors (96848934).

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

87240666 is a wasteful number, since it uses less digits than its factorization.

87240666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 87240666 is about 9340.2711952063. The cubic root of 87240666 is about 443.5129693319.

The spelling of 87240666 in words is "eighty-seven million, two hundred forty thousand, six hundred sixty-six".