66745758 has 8 divisors (see below), whose sum is σ = 133491528. Its totient is φ = 22248584.

The previous prime is 66745753. The next prime is 66745771. The reversal of 66745758 is 85754766.

It is a sphenic number, since it is the product of 3 distinct primes.

66745758 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66745753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5562141 + ... + 5562152.

It is an arithmetic number, because the mean of its divisors is an integer number (16686441).

Almost surely, 2^66745758 is an apocalyptic number.

66745758 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66745758 is a wasteful number, since it uses less digits than its factorization.

66745758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11124298.

The product of its digits is 1411200, while the sum is 48.

The square root of 66745758 is about 8169.8077088754. The cubic root of 66745758 is about 405.6404194904.

The spelling of 66745758 in words is "sixty-six million, seven hundred forty-five thousand, seven hundred fifty-eight".