68006669 has 2 divisors, whose sum is σ = 68006670. Its totient is φ = 68006668.

The previous prime is 68006657. The next prime is 68006683. The reversal of 68006669 is 96660086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57957769 + 10048900 = 7613^2 + 3170^2 .

It is a cyclic number.

It is not a de Polignac number, because 68006669 - 2¹² = 68002573 is a prime.

It is a super-2 number, since 2×68006669² = 9249814056951122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68006639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34003334 + 34003335.

It is an arithmetic number, because the mean of its divisors is an integer number (34003335).

Almost surely, 2^68006669 is an apocalyptic number.

It is an amenable number.

68006669 is a deficient number, since it is larger than the sum of its proper divisors (1).

68006669 is an equidigital number, since it uses as much as digits as its factorization.

68006669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 68006669 is about 8246.6156088422. The cubic root of 68006669 is about 408.1788531663.

The spelling of 68006669 in words is "sixty-eight million, six thousand, six hundred sixty-nine".