1310667421661 has 8 divisors (see below), whose sum is σ = 1413207234264. Its totient is φ = 1208373215040.

The previous prime is 1310667421631. The next prime is 1310667421699. The reversal of 1310667421661 is 1661247660131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 315595225 + 1310351826436 = 17765^2 + 1144706^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1310667421661 - 2²⁶ = 1310600312797 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 (1310667421621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61390406 + ... + 61411751.

It is an arithmetic number, because the mean of its divisors is an integer number (176650904283).

Almost surely, 2^{1310667421661} is an apocalyptic number.

It is an amenable number.

1310667421661 is a deficient number, since it is larger than the sum of its proper divisors (102539812603).

1310667421661 is a wasteful number, since it uses less digits than its factorization.

1310667421661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122802991.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 1310667421661 in words is "one trillion, three hundred ten billion, six hundred sixty-seven million, four hundred twenty-one thousand, six hundred sixty-one".