166343611 has 4 divisors (see below), whose sum is σ = 190106992. Its totient is φ = 142580232.

The previous prime is 166343603. The next prime is 166343621. The reversal of 166343611 is 116343661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 116343661 = 7 ⋅16620523.

It is a cyclic number.

It is not a de Polignac number, because 166343611 - 2³ = 166343603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166343621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11881680 + ... + 11881693.

It is an arithmetic number, because the mean of its divisors is an integer number (47526748).

Almost surely, 2^166343611 is an apocalyptic number.

166343611 is a deficient number, since it is larger than the sum of its proper divisors (23763381).

166343611 is an equidigital number, since it uses as much as digits as its factorization.

166343611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23763380.

The product of its digits is 7776, while the sum is 31.

The square root of 166343611 is about 12897.4265262493. The cubic root of 166343611 is about 549.9654093948.

The spelling of 166343611 in words is "one hundred sixty-six million, three hundred forty-three thousand, six hundred eleven".