66474224 has 10 divisors (see below), whose sum is σ = 128793840. Its totient is φ = 33237104.

The previous prime is 66474223. The next prime is 66474227. The reversal of 66474224 is 42247466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66474223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2077304 + ... + 2077335.

It is an arithmetic number, because the mean of its divisors is an integer number (12879384).

Almost surely, 2^66474224 is an apocalyptic number.

It is an amenable number.

66474224 is a deficient number, since it is larger than the sum of its proper divisors (62319616).

66474224 is a wasteful number, since it uses less digits than its factorization.

66474224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4154647 (or 4154641 counting only the distinct ones).

The product of its digits is 64512, while the sum is 35.

The square root of 66474224 is about 8153.1726340119. The cubic root of 66474224 is about 405.0895986290.

The spelling of 66474224 in words is "sixty-six million, four hundred seventy-four thousand, two hundred twenty-four".