66807029 has 2 divisors, whose sum is σ = 66807030. Its totient is φ = 66807028.

The previous prime is 66807023. The next prime is 66807043. The reversal of 66807029 is 92070866.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51868804 + 14938225 = 7202^2 + 3865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66807029 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66806983 and 66807001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66807023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33403514 + 33403515.

It is an arithmetic number, because the mean of its divisors is an integer number (33403515).

Almost surely, 2^66807029 is an apocalyptic number.

It is an amenable number.

66807029 is a deficient number, since it is larger than the sum of its proper divisors (1).

66807029 is an equidigital number, since it uses as much as digits as its factorization.

66807029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 66807029 is about 8173.5566921628. The cubic root of 66807029 is about 405.7645042444.

The spelling of 66807029 in words is "sixty-six million, eight hundred seven thousand, twenty-nine".