8391951066 has 16 divisors (see below), whose sum is σ = 16784820864. Its totient is φ = 2797163904.

The previous prime is 8391951049. The next prime is 8391951083. The reversal of 8391951066 is 6601591938.

It is an interprime number because it is at equal distance from previous prime (8391951049) and next prime (8391951083).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157455 + ... + 203901.

It is an arithmetic number, because the mean of its divisors is an integer number (1049051304).

Almost surely, 2^8391951066 is an apocalyptic number.

8391951066 is an abundant number, since it is smaller than the sum of its proper divisors (8392869798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8391951066 is a wasteful number, since it uses less digits than its factorization.

8391951066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76565.

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 8391951066 is about 91607.5928403317. The cubic root of 8391951066 is about 2032.1432277896.

The spelling of 8391951066 in words is "eight billion, three hundred ninety-one million, nine hundred fifty-one thousand, sixty-six".