166637147 has 2 divisors, whose sum is σ = 166637148. Its totient is φ = 166637146.

The previous prime is 166637113. The next prime is 166637167. The reversal of 166637147 is 741736661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166637147 - 2²² = 162442843 is a prime.

It is not a weakly prime, because it can be changed into another prime (166637167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83318573 + 83318574.

It is an arithmetic number, because the mean of its divisors is an integer number (83318574).

Almost surely, 2^166637147 is an apocalyptic number.

166637147 is a deficient number, since it is larger than the sum of its proper divisors (1).

166637147 is an equidigital number, since it uses as much as digits as its factorization.

166637147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 41.

The square root of 166637147 is about 12908.8011449553. The cubic root of 166637147 is about 550.2887156334.

The spelling of 166637147 in words is "one hundred sixty-six million, six hundred thirty-seven thousand, one hundred forty-seven".