67745669 has 2 divisors, whose sum is σ = 67745670. Its totient is φ = 67745668.

The previous prime is 67745641. The next prime is 67745677. The reversal of 67745669 is 96654776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67732900 + 12769 = 8230^2 + 113^2 .

It is a cyclic number.

It is not a de Polignac number, because 67745669 - 2¹⁶ = 67680133 is a prime.

It is a super-2 number, since 2×67745669² = 9178951336515122, 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 (67745609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33872834 + 33872835.

It is an arithmetic number, because the mean of its divisors is an integer number (33872835).

Almost surely, 2^67745669 is an apocalyptic number.

It is an amenable number.

67745669 is a deficient number, since it is larger than the sum of its proper divisors (1).

67745669 is an equidigital number, since it uses as much as digits as its factorization.

67745669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 50.

The square root of 67745669 is about 8230.7757228587. The cubic root of 67745669 is about 407.6560061086.

The spelling of 67745669 in words is "sixty-seven million, seven hundred forty-five thousand, six hundred sixty-nine".