87665602 has 4 divisors (see below), whose sum is σ = 131498406. Its totient is φ = 43832800.

The previous prime is 87665597. The next prime is 87665603. The reversal of 87665602 is 20656678.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 54037201 + 33628401 = 7351^2 + 5799^2 .

It is not an unprimeable number, because it can be changed into a prime (87665603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21916399 + ... + 21916402.

Almost surely, 2^87665602 is an apocalyptic number.

87665602 is a deficient number, since it is larger than the sum of its proper divisors (43832804).

87665602 is a wasteful number, since it uses less digits than its factorization.

87665602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43832803.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 87665602 is about 9362.9910819139. The cubic root of 87665602 is about 444.2318980416.

The spelling of 87665602 in words is "eighty-seven million, six hundred sixty-five thousand, six hundred two".