66205230190 has 16 divisors (see below), whose sum is σ = 130002997680. Its totient is φ = 24074629120.

The previous prime is 66205230167. The next prime is 66205230241. The reversal of 66205230190 is 9103250266.

It is a super-2 number, since 2×66205230190² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300932755 + ... + 300932974.

It is an arithmetic number, because the mean of its divisors is an integer number (8125187355).

Almost surely, 2^66205230190 is an apocalyptic number.

66205230190 is a deficient number, since it is larger than the sum of its proper divisors (63797767490).

66205230190 is a wasteful number, since it uses less digits than its factorization.

66205230190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601865747.

The product of its (nonzero) digits is 19440, while the sum is 34.

The spelling of 66205230190 in words is "sixty-six billion, two hundred five million, two hundred thirty thousand, one hundred ninety".