66800370 has 64 divisors (see below), whose sum is σ = 197326080. Its totient is φ = 14093568.

The previous prime is 66800353. The next prime is 66800389. The reversal of 66800370 is 7300866.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 31 ways as a sum of consecutive naturals, for example, 9505 + ... + 14964.

It is an arithmetic number, because the mean of its divisors is an integer number (3083220).

Almost surely, 2^66800370 is an apocalyptic number.

66800370 is an abundant number, since it is smaller than the sum of its proper divisors (130525710).

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

66800370 is a wasteful number, since it uses less digits than its factorization.

66800370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24499.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 66800370 is about 8173.1493318059. The cubic root of 66800370 is about 405.7510222518.

The spelling of 66800370 in words is "sixty-six million, eight hundred thousand, three hundred seventy".