66166611666151 has 2 divisors, whose sum is σ = 66166611666152. Its totient is φ = 66166611666150.

The previous prime is 66166611666121. The next prime is 66166611666187. The reversal of 66166611666151 is 15166611666166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66166611666151 - 2¹³ = 66166611657959 is a prime.

It is a super-2 number, since 2×66166611666151² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66166611666121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33083305833075 + 33083305833076.

It is an arithmetic number, because the mean of its divisors is an integer number (33083305833076).

Almost surely, 2^{66166611666151} is an apocalyptic number.

66166611666151 is a deficient number, since it is larger than the sum of its proper divisors (1).

66166611666151 is an equidigital number, since it uses as much as digits as its factorization.

66166611666151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8398080, while the sum is 58.

The spelling of 66166611666151 in words is "sixty-six trillion, one hundred sixty-six billion, six hundred eleven million, six hundred sixty-six thousand, one hundred fifty-one".