66969061 has 2 divisors, whose sum is σ = 66969062. Its totient is φ = 66969060.

The previous prime is 66969043. The next prime is 66969101. The reversal of 66969061 is 16096966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64096036 + 2873025 = 8006^2 + 1695^2 .

It is a cyclic number.

It is not a de Polignac number, because 66969061 - 2¹¹ = 66967013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66968999 and 66969017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66969041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33484530 + 33484531.

It is an arithmetic number, because the mean of its divisors is an integer number (33484531).

Almost surely, 2^66969061 is an apocalyptic number.

It is an amenable number.

66969061 is a deficient number, since it is larger than the sum of its proper divisors (1).

66969061 is an equidigital number, since it uses as much as digits as its factorization.

66969061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 66969061 is about 8183.4626534249. The cubic root of 66969061 is about 406.0922828884.

The spelling of 66969061 in words is "sixty-six million, nine hundred sixty-nine thousand, sixty-one".