166212947 has 2 divisors, whose sum is σ = 166212948. Its totient is φ = 166212946.

The previous prime is 166212923. The next prime is 166212967. The reversal of 166212947 is 749212661.

166212947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166212947 - 2⁶ = 166212883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166212947.

It is not a weakly prime, because it can be changed into another prime (166212967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83106473 + 83106474.

It is an arithmetic number, because the mean of its divisors is an integer number (83106474).

Almost surely, 2^166212947 is an apocalyptic number.

166212947 is a deficient number, since it is larger than the sum of its proper divisors (1).

166212947 is an equidigital number, since it uses as much as digits as its factorization.

166212947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 166212947 is about 12892.3600244486. The cubic root of 166212947 is about 549.8213711924.

The spelling of 166212947 in words is "one hundred sixty-six million, two hundred twelve thousand, nine hundred forty-seven".