66374890 has 32 divisors (see below), whose sum is σ = 122223744. Its totient is φ = 25945920.

The previous prime is 66374887. The next prime is 66374897. The reversal of 66374890 is 9847366.

It is a happy number.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (66374897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104875 + ... + 105505.

It is an arithmetic number, because the mean of its divisors is an integer number (3819492).

Almost surely, 2^66374890 is an apocalyptic number.

66374890 is a deficient number, since it is larger than the sum of its proper divisors (55848854).

66374890 is a wasteful number, since it uses less digits than its factorization.

66374890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 66374890 is about 8147.0786175168. The cubic root of 66374890 is about 404.8877197258.

The spelling of 66374890 in words is "sixty-six million, three hundred seventy-four thousand, eight hundred ninety".