66740658 has 32 divisors (see below), whose sum is σ = 141039360. Its totient is φ = 21020160.

The previous prime is 66740633. The next prime is 66740669. The reversal of 66740658 is 85604766.

It is a happy number.

It is a Curzon number.

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, 4098 + ... + 12258.

It is an arithmetic number, because the mean of its divisors is an integer number (4407480).

Almost surely, 2^66740658 is an apocalyptic number.

66740658 is an abundant number, since it is smaller than the sum of its proper divisors (74298702).

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

66740658 is a wasteful number, since it uses less digits than its factorization.

66740658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8242.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 66740658 is about 8169.4955780636. The cubic root of 66740658 is about 405.6300876536.

The spelling of 66740658 in words is "sixty-six million, seven hundred forty thousand, six hundred fifty-eight".