66669151 has 2 divisors, whose sum is σ = 66669152. Its totient is φ = 66669150.

The previous prime is 66669143. The next prime is 66669181. The reversal of 66669151 is 15196666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66669151 - 2³ = 66669143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66669101) 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 as a sum of consecutive naturals, namely, 33334575 + 33334576.

It is an arithmetic number, because the mean of its divisors is an integer number (33334576).

Almost surely, 2^66669151 is an apocalyptic number.

66669151 is a deficient number, since it is larger than the sum of its proper divisors (1).

66669151 is an equidigital number, since it uses as much as digits as its factorization.

66669151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 40.

The square root of 66669151 is about 8165.1179415854. The cubic root of 66669151 is about 405.4851697147.

The spelling of 66669151 in words is "sixty-six million, six hundred sixty-nine thousand, one hundred fifty-one".