66375878 has 8 divisors (see below), whose sum is σ = 100530768. Its totient is φ = 32865624.

The previous prime is 66375863. The next prime is 66375889. The reversal of 66375878 is 87857366.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160901 + ... + 161312.

It is an arithmetic number, because the mean of its divisors is an integer number (12566346).

Almost surely, 2^66375878 is an apocalyptic number.

66375878 is a deficient number, since it is larger than the sum of its proper divisors (34154890).

66375878 is a wasteful number, since it uses less digits than its factorization.

66375878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322318.

The product of its digits is 1693440, while the sum is 50.

The square root of 66375878 is about 8147.1392525229. The cubic root of 66375878 is about 404.8897286536.

The spelling of 66375878 in words is "sixty-six million, three hundred seventy-five thousand, eight hundred seventy-eight".