8420575065 has 32 divisors (see below), whose sum is σ = 16303368960. Its totient is φ = 3622969344.

The previous prime is 8420575063. The next prime is 8420575073. The reversal of 8420575065 is 5605750248.

It is not a de Polignac number, because 8420575065 - 2¹ = 8420575063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8420575063) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2356920 + ... + 2360489.

It is an arithmetic number, because the mean of its divisors is an integer number (509480280).

Almost surely, 2^8420575065 is an apocalyptic number.

8420575065 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8420575065 is a deficient number, since it is larger than the sum of its proper divisors (7882793895).

8420575065 is a wasteful number, since it uses less digits than its factorization.

8420575065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4717441.

The product of its (nonzero) digits is 336000, while the sum is 42.

The square root of 8420575065 is about 91763.6914307614. The cubic root of 8420575065 is about 2034.4510763219.

The spelling of 8420575065 in words is "eight billion, four hundred twenty million, five hundred seventy-five thousand, sixty-five".