12661037990 has 8 divisors (see below), whose sum is σ = 22789868400. Its totient is φ = 5064415192.

The previous prime is 12661037981. The next prime is 12661038007. The reversal of 12661037990 is 9973016621.

12661037990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 633051890 + ... + 633051909.

It is an arithmetic number, because the mean of its divisors is an integer number (2848733550).

Almost surely, 2^12661037990 is an apocalyptic number.

12661037990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12661037990 is a deficient number, since it is larger than the sum of its proper divisors (10128830410).

12661037990 is a wasteful number, since it uses less digits than its factorization.

12661037990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266103806.

The product of its (nonzero) digits is 122472, while the sum is 44.

The spelling of 12661037990 in words is "twelve billion, six hundred sixty-one million, thirty-seven thousand, nine hundred ninety".