166815349 has 2 divisors, whose sum is σ = 166815350. Its totient is φ = 166815348.

The previous prime is 166815331. The next prime is 166815367. The reversal of 166815349 is 943518661.

It is a balanced prime because it is at equal distance from previous prime (166815331) and next prime (166815367).

It can be written as a sum of positive squares in only one way, i.e., 165302449 + 1512900 = 12857^2 + 1230^2 .

It is a cyclic number.

It is not a de Polignac number, because 166815349 - 2¹¹ = 166813301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166815329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83407674 + 83407675.

It is an arithmetic number, because the mean of its divisors is an integer number (83407675).

Almost surely, 2^166815349 is an apocalyptic number.

It is an amenable number.

166815349 is a deficient number, since it is larger than the sum of its proper divisors (1).

166815349 is an equidigital number, since it uses as much as digits as its factorization.

166815349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 43.

The square root of 166815349 is about 12915.7016456714. The cubic root of 166815349 is about 550.4848055933.

The spelling of 166815349 in words is "one hundred sixty-six million, eight hundred fifteen thousand, three hundred forty-nine".