8801621566 has 4 divisors (see below), whose sum is σ = 13202432352. Its totient is φ = 4400810782.

The previous prime is 8801621551. The next prime is 8801621567. The reversal of 8801621566 is 6651261088.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8801621567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2200405390 + ... + 2200405393.

It is an arithmetic number, because the mean of its divisors is an integer number (3300608088).

Almost surely, 2^8801621566 is an apocalyptic number.

8801621566 is a deficient number, since it is larger than the sum of its proper divisors (4400810786).

8801621566 is a wasteful number, since it uses less digits than its factorization.

8801621566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4400810785.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 8801621566 is about 93816.9577741679. The cubic root of 8801621566 is about 2064.6870345136.

The spelling of 8801621566 in words is "eight billion, eight hundred one million, six hundred twenty-one thousand, five hundred sixty-six".