66924161 has 2 divisors, whose sum is σ = 66924162. Its totient is φ = 66924160.

The previous prime is 66924127. The next prime is 66924197. The reversal of 66924161 is 16142966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33930625 + 32993536 = 5825^2 + 5744^2 .

It is a cyclic number.

It is not a de Polignac number, because 66924161 - 2⁶ = 66924097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66924661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33462080 + 33462081.

It is an arithmetic number, because the mean of its divisors is an integer number (33462081).

Almost surely, 2^66924161 is an apocalyptic number.

It is an amenable number.

66924161 is a deficient number, since it is larger than the sum of its proper divisors (1).

66924161 is an equidigital number, since it uses as much as digits as its factorization.

66924161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 66924161 is about 8180.7188559441. The cubic root of 66924161 is about 406.0015065423.

The spelling of 66924161 in words is "sixty-six million, nine hundred twenty-four thousand, one hundred sixty-one".