74478566 has 4 divisors (see below), whose sum is σ = 111717852. Its totient is φ = 37239282.

The previous prime is 74478559. The next prime is 74478571. The reversal of 74478566 is 66587447.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66587447 = 521 ⋅127807.

It is a self number, because there is not a number n which added to its sum of digits gives 74478566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18619640 + ... + 18619643.

It is an arithmetic number, because the mean of its divisors is an integer number (27929463).

Almost surely, 2^74478566 is an apocalyptic number.

74478566 is a deficient number, since it is larger than the sum of its proper divisors (37239286).

74478566 is a wasteful number, since it uses less digits than its factorization.

74478566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37239285.

The product of its digits is 1128960, while the sum is 47.

The square root of 74478566 is about 8630.0965232146. The cubic root of 74478566 is about 420.7367378947.

The spelling of 74478566 in words is "seventy-four million, four hundred seventy-eight thousand, five hundred sixty-six".