166426763 has 2 divisors, whose sum is σ = 166426764. Its totient is φ = 166426762.

The previous prime is 166426691. The next prime is 166426801. The reversal of 166426763 is 367624661.

It is a strong prime.

It is an emirp because it is prime and its reverse (367624661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166426763 - 2¹² = 166422667 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166426763.

It is not a weakly prime, because it can be changed into another prime (166426163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83213381 + 83213382.

It is an arithmetic number, because the mean of its divisors is an integer number (83213382).

Almost surely, 2^166426763 is an apocalyptic number.

166426763 is a deficient number, since it is larger than the sum of its proper divisors (1).

166426763 is an equidigital number, since it uses as much as digits as its factorization.

166426763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 41.

The square root of 166426763 is about 12900.6497123207. The cubic root of 166426763 is about 550.0570332041.

The spelling of 166426763 in words is "one hundred sixty-six million, four hundred twenty-six thousand, seven hundred sixty-three".