66705571151 has 2 divisors, whose sum is σ = 66705571152. Its totient is φ = 66705571150.

The previous prime is 66705571139. The next prime is 66705571181. The reversal of 66705571151 is 15117550766.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66705571151 is a prime.

It is a super-2 number, since 2×66705571151² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66705571181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33352785575 + 33352785576.

It is an arithmetic number, because the mean of its divisors is an integer number (33352785576).

Almost surely, 2^66705571151 is an apocalyptic number.

66705571151 is a deficient number, since it is larger than the sum of its proper divisors (1).

66705571151 is an equidigital number, since it uses as much as digits as its factorization.

66705571151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 220500, while the sum is 44.

The spelling of 66705571151 in words is "sixty-six billion, seven hundred five million, five hundred seventy-one thousand, one hundred fifty-one".