87666402 has 16 divisors (see below), whose sum is σ = 175795200. Its totient is φ = 29145072.

The previous prime is 87666373. The next prime is 87666407. The reversal of 87666402 is 20466678.

It is not an unprimeable number, because it can be changed into a prime (87666407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16777 + ... + 21372.

It is an arithmetic number, because the mean of its divisors is an integer number (10987200).

Almost surely, 2^87666402 is an apocalyptic number.

87666402 is an abundant number, since it is smaller than the sum of its proper divisors (88128798).

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

87666402 is a wasteful number, since it uses less digits than its factorization.

87666402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38537.

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

The square root of 87666402 is about 9363.0338032072. The cubic root of 87666402 is about 444.2332493296.

The spelling of 87666402 in words is "eighty-seven million, six hundred sixty-six thousand, four hundred two".