87805066 has 4 divisors (see below), whose sum is σ = 131707602. Its totient is φ = 43902532.

The previous prime is 87805063. The next prime is 87805073. The reversal of 87805066 is 66050878.

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., 67815225 + 19989841 = 8235^2 + 4471^2 .

It is not an unprimeable number, because it can be changed into a prime (87805063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21951265 + ... + 21951268.

Almost surely, 2^87805066 is an apocalyptic number.

87805066 is a deficient number, since it is larger than the sum of its proper divisors (43902536).

87805066 is a wasteful number, since it uses less digits than its factorization.

87805066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43902535.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 87805066 is about 9370.4357422694. The cubic root of 87805066 is about 444.4673439914.

The spelling of 87805066 in words is "eighty-seven million, eight hundred five thousand, sixty-six".