66920230 has 32 divisors (see below), whose sum is σ = 130292064. Its totient is φ = 24600576.

The previous prime is 66920213. The next prime is 66920263. The reversal of 66920230 is 3202966.

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 15 ways as a sum of consecutive naturals, for example, 32409 + ... + 34411.

It is an arithmetic number, because the mean of its divisors is an integer number (4071627).

Almost surely, 2^66920230 is an apocalyptic number.

66920230 is a deficient number, since it is larger than the sum of its proper divisors (63371834).

66920230 is a wasteful number, since it uses less digits than its factorization.

66920230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280.

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

The square root of 66920230 is about 8180.4785923563. The cubic root of 66920230 is about 405.9935571304.

The spelling of 66920230 in words is "sixty-six million, nine hundred twenty thousand, two hundred thirty".