12666135950 has 36 divisors (see below), whose sum is σ = 25510664088. Its totient is φ = 4676724000.

The previous prime is 12666135917. The next prime is 12666135983. The reversal of 12666135950 is 5953166621.

It is an interprime number because it is at equal distance from previous prime (12666135917) and next prime (12666135983).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 741026 + ... + 757925.

It is an arithmetic number, because the mean of its divisors is an integer number (708629558).

Almost surely, 2^12666135950 is an apocalyptic number.

12666135950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12666135950 is an abundant number, since it is smaller than the sum of its proper divisors (12844528138).

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

12666135950 is a wasteful number, since it uses less digits than its factorization.

12666135950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498989 (or 1498971 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 44.

The spelling of 12666135950 in words is "twelve billion, six hundred sixty-six million, one hundred thirty-five thousand, nine hundred fifty".