66706758 has 24 divisors (see below), whose sum is σ = 152139000. Its totient is φ = 21065184.

The previous prime is 66706753. The next prime is 66706789. The reversal of 66706758 is 85760766.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66706753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97183 + ... + 97866.

It is an arithmetic number, because the mean of its divisors is an integer number (6339125).

Almost surely, 2^66706758 is an apocalyptic number.

66706758 is an abundant number, since it is smaller than the sum of its proper divisors (85432242).

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

66706758 is a wasteful number, since it uses less digits than its factorization.

66706758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195076 (or 195073 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 66706758 is about 8167.4205230293. The cubic root of 66706758 is about 405.5613979462.

The spelling of 66706758 in words is "sixty-six million, seven hundred six thousand, seven hundred fifty-eight".