66302290 has 8 divisors (see below), whose sum is σ = 119344140. Its totient is φ = 26520912.

The previous prime is 66302287. The next prime is 66302317. The reversal of 66302290 is 9220366.

It can be written as a sum of positive squares in 2 ways, for example, as 65950641 + 351649 = 8121^2 + 593^2 .

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

It is a super-3 number, since 3×66302290³ (a number of 24 digits) contains 333 as substring.

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, 3315105 + ... + 3315124.

Almost surely, 2^66302290 is an apocalyptic number.

66302290 is a deficient number, since it is larger than the sum of its proper divisors (53041850).

66302290 is a wasteful number, since it uses less digits than its factorization.

66302290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6630236.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 66302290 is about 8142.6218136421. The cubic root of 66302290 is about 404.7400455466.

The spelling of 66302290 in words is "sixty-six million, three hundred two thousand, two hundred ninety".