166949149963393 has 48 divisors (see below), whose sum is σ = 201960237433680. Its totient is φ = 137437791289344.

The previous prime is 166949149963373. The next prime is 166949149963411. The reversal of 166949149963393 is 393369941949661.

166949149963393 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 55028979095104 + 111920170868289 = 7418152^2 + 10579233^2 .

It is a de Polignac number, because none of the positive numbers 2^k-166949149963393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166949149963313) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6674482755 + ... + 6674507767.

It is an arithmetic number, because the mean of its divisors is an integer number (4207504946535).

Almost surely, 2^{166949149963393} is an apocalyptic number.

It is an amenable number.

166949149963393 is a deficient number, since it is larger than the sum of its proper divisors (35011087470287).

166949149963393 is a wasteful number, since it uses less digits than its factorization.

166949149963393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49586 (or 49579 counting only the distinct ones).

The product of its digits is 5509980288, while the sum is 82.

The spelling of 166949149963393 in words is "one hundred sixty-six trillion, nine hundred forty-nine billion, one hundred forty-nine million, nine hundred sixty-three thousand, three hundred ninety-three".