66522790 has 8 divisors (see below), whose sum is σ = 119741040. Its totient is φ = 26609112.

The previous prime is 66522779. The next prime is 66522793. The reversal of 66522790 is 9722566.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66522793) 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, 3326130 + ... + 3326149.

It is an arithmetic number, because the mean of its divisors is an integer number (14967630).

Almost surely, 2^66522790 is an apocalyptic number.

66522790 is a deficient number, since it is larger than the sum of its proper divisors (53218250).

66522790 is a wasteful number, since it uses less digits than its factorization.

66522790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6652286.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 66522790 is about 8156.1504400054. The cubic root of 66522790 is about 405.1882272956.

The spelling of 66522790 in words is "sixty-six million, five hundred twenty-two thousand, seven hundred ninety".