66447474 has 8 divisors (see below), whose sum is σ = 132894960. Its totient is φ = 22149156.

The previous prime is 66447473. The next prime is 66447517. The reversal of 66447474 is 47474466.

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

66447474 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (66447473) 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, 5537284 + ... + 5537295.

It is an arithmetic number, because the mean of its divisors is an integer number (16611870).

Almost surely, 2^66447474 is an apocalyptic number.

66447474 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66447474 is a wasteful number, since it uses less digits than its factorization.

66447474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11074584.

The product of its digits is 451584, while the sum is 42.

The square root of 66447474 is about 8151.5320032495. The cubic root of 66447474 is about 405.0352537518.

The spelling of 66447474 in words is "sixty-six million, four hundred forty-seven thousand, four hundred seventy-four".