66905302 has 8 divisors (see below), whose sum is σ = 106261416. Its totient is φ = 31484832.

The previous prime is 66905297. The next prime is 66905323. The reversal of 66905302 is 20350966.

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

It is a super-2 number, since 2×66905302² = 8952638871422408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 983868 + ... + 983935.

It is an arithmetic number, because the mean of its divisors is an integer number (13282677).

Almost surely, 2^66905302 is an apocalyptic number.

66905302 is a deficient number, since it is larger than the sum of its proper divisors (39356114).

66905302 is a wasteful number, since it uses less digits than its factorization.

66905302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1967822.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 66905302 is about 8179.5661254128. The cubic root of 66905302 is about 405.9633663469.

The spelling of 66905302 in words is "sixty-six million, nine hundred five thousand, three hundred two".