870801566 has 4 divisors (see below), whose sum is σ = 1306202352. Its totient is φ = 435400782.

The previous prime is 870801517. The next prime is 870801577. The reversal of 870801566 is 665108078.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217700390 + ... + 217700393.

It is an arithmetic number, because the mean of its divisors is an integer number (326550588).

Almost surely, 2^870801566 is an apocalyptic number.

870801566 is a deficient number, since it is larger than the sum of its proper divisors (435400786).

870801566 is a wasteful number, since it uses less digits than its factorization.

870801566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435400785.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 870801566 is about 29509.3470954543. The cubic root of 870801566 is about 954.9333637706.

The spelling of 870801566 in words is "eight hundred seventy million, eight hundred one thousand, five hundred sixty-six".