74561671 has 4 divisors (see below), whose sum is σ = 74691472. Its totient is φ = 74431872.

The previous prime is 74561647. The next prime is 74561717. The reversal of 74561671 is 17616547.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17616547 = 13 ⋅1355119.

It is a cyclic number.

It is not a de Polignac number, because 74561671 - 2⁹ = 74561159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74561671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74561621) 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 in 3 ways as a sum of consecutive naturals, for example, 64035 + ... + 65188.

It is an arithmetic number, because the mean of its divisors is an integer number (18672868).

Almost surely, 2^74561671 is an apocalyptic number.

74561671 is a deficient number, since it is larger than the sum of its proper divisors (129801).

74561671 is a wasteful number, since it uses less digits than its factorization.

74561671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129800.

The product of its digits is 35280, while the sum is 37.

The square root of 74561671 is about 8634.9100169023. The cubic root of 74561671 is about 420.8931691629.

The spelling of 74561671 in words is "seventy-four million, five hundred sixty-one thousand, six hundred seventy-one".