69664457 has 2 divisors, whose sum is σ = 69664458. Its totient is φ = 69664456.

The previous prime is 69664433. The next prime is 69664477. The reversal of 69664457 is 75446696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69488896 + 175561 = 8336^2 + 419^2 .

It is a cyclic number.

It is not a de Polignac number, because 69664457 - 2⁸ = 69664201 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (69664417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34832228 + 34832229.

It is an arithmetic number, because the mean of its divisors is an integer number (34832229).

Almost surely, 2^69664457 is an apocalyptic number.

It is an amenable number.

69664457 is a deficient number, since it is larger than the sum of its proper divisors (1).

69664457 is an equidigital number, since it uses as much as digits as its factorization.

69664457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 47.

The square root of 69664457 is about 8346.5236476032. The cubic root of 69664457 is about 411.4689662111.

The spelling of 69664457 in words is "sixty-nine million, six hundred sixty-four thousand, four hundred fifty-seven".