12961666796 has 48 divisors (see below), whose sum is σ = 25995009600. Its totient is φ = 5602037760.

The previous prime is 12961666793. The next prime is 12961666799. The reversal of 12961666796 is 69766616921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12961666793) and next prime (12961666799).

It is a super-2 number, since 2×12961666796² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12961666793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139076 + ... + 212756.

It is an arithmetic number, because the mean of its divisors is an integer number (541562700).

Almost surely, 2^12961666796 is an apocalyptic number.

It is an amenable number.

12961666796 is an abundant number, since it is smaller than the sum of its proper divisors (13033342804).

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

12961666796 is a wasteful number, since it uses less digits than its factorization.

12961666796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73914 (or 73912 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 59.

The spelling of 12961666796 in words is "twelve billion, nine hundred sixty-one million, six hundred sixty-six thousand, seven hundred ninety-six".