66930558 has 16 divisors (see below), whose sum is σ = 137479440. Its totient is φ = 21707136.

The previous prime is 66930557. The next prime is 66930583. The reversal of 66930558 is 85503966.

It is a super-3 number, since 3×66930558³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66930557) 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 in 7 ways as a sum of consecutive naturals, for example, 150523 + ... + 150966.

It is an arithmetic number, because the mean of its divisors is an integer number (8592465).

Almost surely, 2^66930558 is an apocalyptic number.

66930558 is an abundant number, since it is smaller than the sum of its proper divisors (70548882).

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

66930558 is a wasteful number, since it uses less digits than its factorization.

66930558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301531.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 66930558 is about 8181.1098269122. The cubic root of 66930558 is about 406.0144421242.

The spelling of 66930558 in words is "sixty-six million, nine hundred thirty thousand, five hundred fifty-eight".