9406166391 has 40 divisors (see below), whose sum is σ = 15041558400. Its totient is φ = 5839989840.

The previous prime is 9406166383. The next prime is 9406166417. The reversal of 9406166391 is 1936616049.

9406166391 is a `hidden beast` number, since 9 + 4 + 0 + 6 + 1 + 6 + 639 + 1 = 666.

It is not a de Polignac number, because 9406166391 - 2³ = 9406166383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9406166321) 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, 39006 + ... + 142596.

It is an arithmetic number, because the mean of its divisors is an integer number (376038960).

Almost surely, 2^9406166391 is an apocalyptic number.

9406166391 is a deficient number, since it is larger than the sum of its proper divisors (5635392009).

9406166391 is a wasteful number, since it uses less digits than its factorization.

9406166391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103681 (or 103672 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 9406166391 is about 96985.3926681745. The cubic root of 9406166391 is about 2110.9156789478.

The spelling of 9406166391 in words is "nine billion, four hundred six million, one hundred sixty-six thousand, three hundred ninety-one".