74686669 has 2 divisors, whose sum is σ = 74686670. Its totient is φ = 74686668.

The previous prime is 74686621. The next prime is 74686721. The reversal of 74686669 is 96668647.

It is an a-pointer prime, because the next prime (74686721) can be obtained adding 74686669 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67732900 + 6953769 = 8230^2 + 2637^2 .

It is a cyclic number.

It is not a de Polignac number, because 74686669 - 2¹³ = 74678477 is a prime.

It is a super-2 number, since 2×74686669² = 11156197052631122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74686069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37343334 + 37343335.

It is an arithmetic number, because the mean of its divisors is an integer number (37343335).

Almost surely, 2^74686669 is an apocalyptic number.

It is an amenable number.

74686669 is a deficient number, since it is larger than the sum of its proper divisors (1).

74686669 is an equidigital number, since it uses as much as digits as its factorization.

74686669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 52.

The square root of 74686669 is about 8642.1449305135. The cubic root of 74686669 is about 421.1282382515.

The spelling of 74686669 in words is "seventy-four million, six hundred eighty-six thousand, six hundred sixty-nine".