66343828 has 6 divisors (see below), whose sum is σ = 116101706. Its totient is φ = 33171912.

The previous prime is 66343811. The next prime is 66343841. The reversal of 66343828 is 82834366.

It can be written as a sum of positive squares in only one way, i.e., 44328964 + 22014864 = 6658^2 + 4692^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8292975 + ... + 8292982.

Almost surely, 2^66343828 is an apocalyptic number.

It is an amenable number.

66343828 is a deficient number, since it is larger than the sum of its proper divisors (49757878).

66343828 is a wasteful number, since it uses less digits than its factorization.

66343828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16585961 (or 16585959 counting only the distinct ones).

The product of its digits is 165888, while the sum is 40.

The square root of 66343828 is about 8145.1720669363. The cubic root of 66343828 is about 404.8245503319.

The spelling of 66343828 in words is "sixty-six million, three hundred forty-three thousand, eight hundred twenty-eight".