166348149791 has 2 divisors, whose sum is σ = 166348149792. Its totient is φ = 166348149790.

The previous prime is 166348149749. The next prime is 166348149797. The reversal of 166348149791 is 197941843661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166348149791 - 2¹⁰ = 166348148767 is a prime.

It is a super-3 number, since 3×166348149791³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166348149791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166348149797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83174074895 + 83174074896.

It is an arithmetic number, because the mean of its divisors is an integer number (83174074896).

Almost surely, 2^166348149791 is an apocalyptic number.

166348149791 is a deficient number, since it is larger than the sum of its proper divisors (1).

166348149791 is an equidigital number, since it uses as much as digits as its factorization.

166348149791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 59.

The spelling of 166348149791 in words is "one hundred sixty-six billion, three hundred forty-eight million, one hundred forty-nine thousand, seven hundred ninety-one".