12406702661 has 4 divisors (see below), whose sum is σ = 12581445024. Its totient is φ = 12231960300.

The previous prime is 12406702639. The next prime is 12406702681. The reversal of 12406702661 is 16620760421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16620760421 = 1553 ⋅10702357.

It is a cyclic number.

It is not a de Polignac number, because 12406702661 - 2⁶ = 12406702597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12406702681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87371075 + ... + 87371216.

It is an arithmetic number, because the mean of its divisors is an integer number (3145361256).

Almost surely, 2^12406702661 is an apocalyptic number.

It is an amenable number.

12406702661 is a deficient number, since it is larger than the sum of its proper divisors (174742363).

12406702661 is an equidigital number, since it uses as much as digits as its factorization.

12406702661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174742362.

The product of its (nonzero) digits is 24192, while the sum is 35.

The spelling of 12406702661 in words is "twelve billion, four hundred six million, seven hundred two thousand, six hundred sixty-one".