69666713 has 2 divisors, whose sum is σ = 69666714. Its totient is φ = 69666712.

The previous prime is 69666679. The next prime is 69666721. The reversal of 69666713 is 31766696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69272329 + 394384 = 8323^2 + 628^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69666713 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (69666733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34833356 + 34833357.

It is an arithmetic number, because the mean of its divisors is an integer number (34833357).

Almost surely, 2^69666713 is an apocalyptic number.

It is an amenable number.

69666713 is a deficient number, since it is larger than the sum of its proper divisors (1).

69666713 is an equidigital number, since it uses as much as digits as its factorization.

69666713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 44.

The square root of 69666713 is about 8346.6587925948. The cubic root of 69666713 is about 411.4734078063.

The spelling of 69666713 in words is "sixty-nine million, six hundred sixty-six thousand, seven hundred thirteen".