8066156985 has 40 divisors (see below), whose sum is σ = 14510994696. Its totient is φ = 4286580480.

The previous prime is 8066156983. The next prime is 8066157023. The reversal of 8066156985 is 5896516608.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3851940096 + 4214216889 = 62064^2 + 64917^2 .

It is not a de Polignac number, because 8066156985 - 2¹ = 8066156983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8066156983) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 78367 + ... + 149243.

Almost surely, 2^8066156985 is an apocalyptic number.

It is an amenable number.

8066156985 is a deficient number, since it is larger than the sum of its proper divisors (6444837711).

8066156985 is a wasteful number, since it uses less digits than its factorization.

8066156985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71175 (or 71166 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 54.

The square root of 8066156985 is about 89811.7864481049. The cubic root of 8066156985 is about 2005.4979544825.

The spelling of 8066156985 in words is "eight billion, sixty-six million, one hundred fifty-six thousand, nine hundred eighty-five".