66830885 has 32 divisors (see below), whose sum is σ = 95109120. Its totient is φ = 44539200.

The previous prime is 66830879. The next prime is 66830899. The reversal of 66830885 is 58803866.

It is not a de Polignac number, because 66830885 - 2¹² = 66826789 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31364 + ... + 33426.

It is an arithmetic number, because the mean of its divisors is an integer number (2972160).

Almost surely, 2^66830885 is an apocalyptic number.

It is an amenable number.

66830885 is a deficient number, since it is larger than the sum of its proper divisors (28278235).

66830885 is a wasteful number, since it uses less digits than its factorization.

66830885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129.

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 66830885 is about 8175.0159021252. The cubic root of 66830885 is about 405.8127963987.

The spelling of 66830885 in words is "sixty-six million, eight hundred thirty thousand, eight hundred eighty-five".