69668444381 has 2 divisors, whose sum is σ = 69668444382. Its totient is φ = 69668444380.

The previous prime is 69668444357. The next prime is 69668444401. The reversal of 69668444381 is 18344486696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64816068100 + 4852376281 = 254590^2 + 69659^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69668444381 is a prime.

It is a super-3 number, since 3×69668444381³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 69668444381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69668444581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34834222190 + 34834222191.

It is an arithmetic number, because the mean of its divisors is an integer number (34834222191).

Almost surely, 2^69668444381 is an apocalyptic number.

It is an amenable number.

69668444381 is a deficient number, since it is larger than the sum of its proper divisors (1).

69668444381 is an equidigital number, since it uses as much as digits as its factorization.

69668444381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23887872, while the sum is 59.

The spelling of 69668444381 in words is "sixty-nine billion, six hundred sixty-eight million, four hundred forty-four thousand, three hundred eighty-one".