166311312947 has 16 divisors (see below), whose sum is σ = 182150317440. Its totient is φ = 150924114432.

The previous prime is 166311312941. The next prime is 166311312977. The reversal of 166311312947 is 749213113661.

It is not a de Polignac number, because 166311312947 - 2²² = 166307118643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166311312898 and 166311312907.

It is not an unprimeable number, because it can be changed into a prime (166311312941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108218 + ... + 586799.

It is an arithmetic number, because the mean of its divisors is an integer number (11384394840).

Almost surely, 2^166311312947 is an apocalyptic number.

166311312947 is a deficient number, since it is larger than the sum of its proper divisors (15839004493).

166311312947 is a wasteful number, since it uses less digits than its factorization.

166311312947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695342.

The product of its digits is 163296, while the sum is 44.

It can be divided in two parts, 166 and 311312947, that added together give a palindrome (311313113).

The spelling of 166311312947 in words is "one hundred sixty-six billion, three hundred eleven million, three hundred twelve thousand, nine hundred forty-seven".