66724130 has 32 divisors (see below), whose sum is σ = 132269760. Its totient is φ = 24032320.

The previous prime is 66724129. The next prime is 66724159. The reversal of 66724130 is 3142766.

It is a junction number, because it is equal to n+sod(n) for n = 66724093 and 66724102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8936 + ... + 14604.

It is an arithmetic number, because the mean of its divisors is an integer number (4133430).

Almost surely, 2^66724130 is an apocalyptic number.

66724130 is a deficient number, since it is larger than the sum of its proper divisors (65545630).

66724130 is a wasteful number, since it uses less digits than its factorization.

66724130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5794.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 66724130 is about 8168.4839474654. The cubic root of 66724130 is about 405.5966007817.

Adding to 66724130 its reverse (3142766), we get a palindrome (69866896).

The spelling of 66724130 in words is "sixty-six million, seven hundred twenty-four thousand, one hundred thirty".