8066715771021 has 32 divisors (see below), whose sum is σ = 11608199424000. Its totient is φ = 4964135811840.

The previous prime is 8066715771007. The next prime is 8066715771043. The reversal of 8066715771021 is 1201775176608.

It is not a de Polignac number, because 8066715771021 - 2¹⁸ = 8066715508877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8066715771091) 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, 1813171 + ... + 4406928.

It is an arithmetic number, because the mean of its divisors is an integer number (362756232000).

Almost surely, 2^{8066715771021} is an apocalyptic number.

It is an amenable number.

8066715771021 is a deficient number, since it is larger than the sum of its proper divisors (3541483652979).

8066715771021 is a wasteful number, since it uses less digits than its factorization.

8066715771021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6220609.

The product of its (nonzero) digits is 987840, while the sum is 51.

The spelling of 8066715771021 in words is "eight trillion, sixty-six billion, seven hundred fifteen million, seven hundred seventy-one thousand, twenty-one".