66628310 has 32 divisors (see below), whose sum is σ = 137547072. Its totient is φ = 22763520.

The previous prime is 66628301. The next prime is 66628327. The reversal of 66628310 is 1382666.

It is a super-2 number, since 2×66628310² = 8878663386912200, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 20390 + ... + 23430.

It is an arithmetic number, because the mean of its divisors is an integer number (4298346).

Almost surely, 2^66628310 is an apocalyptic number.

66628310 is an abundant number, since it is smaller than the sum of its proper divisors (70918762).

66628310 is a wasteful number, since it uses less digits than its factorization.

66628310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3368.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 66628310 is about 8162.6166147872. The cubic root of 66628310 is about 405.4023537880.

The spelling of 66628310 in words is "sixty-six million, six hundred twenty-eight thousand, three hundred ten".