66161351 has 2 divisors, whose sum is σ = 66161352. Its totient is φ = 66161350.

The previous prime is 66161339. The next prime is 66161353. The reversal of 66161351 is 15316166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66161351 - 2¹⁰ = 66160327 is a prime.

It is a super-2 number, since 2×66161351² = 8754648732290402, which contains 22 as substring.

Together with 66161353, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66161353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33080675 + 33080676.

It is an arithmetic number, because the mean of its divisors is an integer number (33080676).

Almost surely, 2^66161351 is an apocalyptic number.

66161351 is a deficient number, since it is larger than the sum of its proper divisors (1).

66161351 is an equidigital number, since it uses as much as digits as its factorization.

66161351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 29.

The square root of 66161351 is about 8133.9628103404. The cubic root of 66161351 is about 404.4530563422.

The spelling of 66161351 in words is "sixty-six million, one hundred sixty-one thousand, three hundred fifty-one".