66017928 has 32 divisors (see below), whose sum is σ = 165245760. Its totient is φ = 21979200.

The previous prime is 66017923. The next prime is 66017933. The reversal of 66017928 is 82971066.

It is an interprime number because it is at equal distance from previous prime (66017923) and next prime (66017933).

It is not an unprimeable number, because it can be changed into a prime (66017923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33778 + ... + 35678.

It is an arithmetic number, because the mean of its divisors is an integer number (5163930).

Almost surely, 2^66017928 is an apocalyptic number.

It is an amenable number.

66017928 is an abundant number, since it is smaller than the sum of its proper divisors (99227832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66017928 is a wasteful number, since it uses less digits than its factorization.

66017928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3357 (or 3353 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 66017928 is about 8125.1417218409. The cubic root of 66017928 is about 404.1605903410.

The spelling of 66017928 in words is "sixty-six million, seventeen thousand, nine hundred twenty-eight".