66058724 has 6 divisors (see below), whose sum is σ = 115602774. Its totient is φ = 33029360.

The previous prime is 66058721. The next prime is 66058757. The reversal of 66058724 is 42785066.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 55234624 + 10824100 = 7432^2 + 3290^2 .

It is not an unprimeable number, because it can be changed into a prime (66058721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8257337 + ... + 8257344.

It is an arithmetic number, because the mean of its divisors is an integer number (19267129).

Almost surely, 2^66058724 is an apocalyptic number.

It is an amenable number.

66058724 is a deficient number, since it is larger than the sum of its proper divisors (49544050).

66058724 is a wasteful number, since it uses less digits than its factorization.

66058724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16514685 (or 16514683 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 66058724 is about 8127.6518134083. The cubic root of 66058724 is about 404.2438239959.

The spelling of 66058724 in words is "sixty-six million, fifty-eight thousand, seven hundred twenty-four".