74506643 has 8 divisors (see below), whose sum is σ = 75428496. Its totient is φ = 73590400.

The previous prime is 74506639. The next prime is 74506661. The reversal of 74506643 is 34660547.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74506643 - 2² = 74506639 is a prime.

It is a super-2 number, since 2×74506643² = 11102479702258898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74506633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29303 + ... + 31743.

It is an arithmetic number, because the mean of its divisors is an integer number (9428562).

Almost surely, 2^74506643 is an apocalyptic number.

74506643 is a deficient number, since it is larger than the sum of its proper divisors (921853).

74506643 is a wasteful number, since it uses less digits than its factorization.

74506643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2805.

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 74506643 is about 8631.7230608958. The cubic root of 74506643 is about 420.7896011631.

The spelling of 74506643 in words is "seventy-four million, five hundred six thousand, six hundred forty-three".