346166621 has 2 divisors, whose sum is σ = 346166622. Its totient is φ = 346166620.

The previous prime is 346166603. The next prime is 346166633. The reversal of 346166621 is 126661643.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 323604121 + 22562500 = 17989^2 + 4750^2 .

It is a cyclic number.

It is not a de Polignac number, because 346166621 - 2¹⁴ = 346150237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (346166651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173083310 + 173083311.

It is an arithmetic number, because the mean of its divisors is an integer number (173083311).

Almost surely, 2^346166621 is an apocalyptic number.

It is an amenable number.

346166621 is a deficient number, since it is larger than the sum of its proper divisors (1).

346166621 is an equidigital number, since it uses as much as digits as its factorization.

346166621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 35.

The square root of 346166621 is about 18605.5534988884. The cubic root of 346166621 is about 702.1475685638.

The spelling of 346166621 in words is "three hundred forty-six million, one hundred sixty-six thousand, six hundred twenty-one".