74233661 has 4 divisors (see below), whose sum is σ = 74440800. Its totient is φ = 74026524.

The previous prime is 74233637. The next prime is 74233681. The reversal of 74233661 is 16633247.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16633247 = 1117 ⋅14891.

It is a cyclic number.

It is not a de Polignac number, because 74233661 - 2¹⁰ = 74232637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74233631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103031 + ... + 103748.

It is an arithmetic number, because the mean of its divisors is an integer number (18610200).

Almost surely, 2^74233661 is an apocalyptic number.

It is an amenable number.

74233661 is a deficient number, since it is larger than the sum of its proper divisors (207139).

74233661 is a wasteful number, since it uses less digits than its factorization.

74233661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207138.

The product of its digits is 18144, while the sum is 32.

The square root of 74233661 is about 8615.8958327036. The cubic root of 74233661 is about 420.2750673564.

The spelling of 74233661 in words is "seventy-four million, two hundred thirty-three thousand, six hundred sixty-one".