66228490 has 16 divisors (see below), whose sum is σ = 125485920. Its totient is φ = 25097040.

The previous prime is 66228479. The next prime is 66228527. The reversal of 66228490 is 9482266.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174096 + ... + 174475.

It is an arithmetic number, because the mean of its divisors is an integer number (7842870).

Almost surely, 2^66228490 is an apocalyptic number.

66228490 is a deficient number, since it is larger than the sum of its proper divisors (59257430).

66228490 is a wasteful number, since it uses less digits than its factorization.

66228490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348597.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 66228490 is about 8138.0888419825. The cubic root of 66228490 is about 404.5898199422.

The spelling of 66228490 in words is "sixty-six million, two hundred twenty-eight thousand, four hundred ninety".