74643669 has 12 divisors (see below), whose sum is σ = 108643392. Its totient is φ = 49381800.

The previous prime is 74643659. The next prime is 74643707. The reversal of 74643669 is 96634647.

It is not a de Polignac number, because 74643669 - 2¹⁵ = 74610901 is a prime.

It is a super-2 number, since 2×74643669² = 11143354643563122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74643659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30477 + ... + 32834.

It is an arithmetic number, because the mean of its divisors is an integer number (9053616).

Almost surely, 2^74643669 is an apocalyptic number.

It is an amenable number.

74643669 is a deficient number, since it is larger than the sum of its proper divisors (33999723).

74643669 is a wasteful number, since it uses less digits than its factorization.

74643669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63448 (or 63445 counting only the distinct ones).

The product of its digits is 653184, while the sum is 45.

The square root of 74643669 is about 8639.6567640156. The cubic root of 74643669 is about 421.0474028054.

The spelling of 74643669 in words is "seventy-four million, six hundred forty-three thousand, six hundred sixty-nine".