7865166573 has 12 divisors (see below), whose sum is σ = 12393595968. Its totient is φ = 4766767560.

The previous prime is 7865166563. The next prime is 7865166607. The reversal of 7865166573 is 3756615687.

7865166573 is a `hidden beast` number, since 7 + 8 + 6 + 5 + 1 + 66 + 573 = 666.

It is not a de Polignac number, because 7865166573 - 2¹² = 7865162477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7865166563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39722965 + ... + 39723162.

It is an arithmetic number, because the mean of its divisors is an integer number (1032799664).

Almost surely, 2^7865166573 is an apocalyptic number.

It is an amenable number.

7865166573 is a deficient number, since it is larger than the sum of its proper divisors (4528429395).

7865166573 is a wasteful number, since it uses less digits than its factorization.

7865166573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79446144 (or 79446141 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 54.

The square root of 7865166573 is about 88685.7743553046. The cubic root of 7865166573 is about 1988.7001581063.

The spelling of 7865166573 in words is "seven billion, eight hundred sixty-five million, one hundred sixty-six thousand, five hundred seventy-three".