66980438290 has 16 divisors (see below), whose sum is σ = 120568211712. Its totient is φ = 26791414704.

The previous prime is 66980438281. The next prime is 66980438303. The reversal of 66980438290 is 9283408966.

It is a happy number.

It is a super-2 number, since 2×66980438290² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395137 + ... + 538603.

It is an arithmetic number, because the mean of its divisors is an integer number (7535513232).

Almost surely, 2^66980438290 is an apocalyptic number.

66980438290 is a deficient number, since it is larger than the sum of its proper divisors (53587773422).

66980438290 is a wasteful number, since it uses less digits than its factorization.

66980438290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190161.

The product of its (nonzero) digits is 4478976, while the sum is 55.

The spelling of 66980438290 in words is "sixty-six billion, nine hundred eighty million, four hundred thirty-eight thousand, two hundred ninety".