2661326063451 has 12 divisors (see below), whose sum is σ = 4193604706200. Its totient is φ = 1612924886880.

The previous prime is 2661326063449. The next prime is 2661326063479. The reversal of 2661326063451 is 1543606231662.

2661326063451 is a `hidden beast` number, since 2 + 6 + 6 + 1 + 3 + 2 + 6 + 0 + 634 + 5 + 1 = 666.

It is not a de Polignac number, because 2661326063451 - 2¹ = 2661326063449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2661326063397 and 2661326063406.

It is not an unprimeable number, because it can be changed into a prime (2661326063551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13441040626 + ... + 13441040823.

It is an arithmetic number, because the mean of its divisors is an integer number (349467058850).

Almost surely, 2^{2661326063451} is an apocalyptic number.

2661326063451 is a deficient number, since it is larger than the sum of its proper divisors (1532278642749).

2661326063451 is a wasteful number, since it uses less digits than its factorization.

2661326063451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26882081466 (or 26882081463 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 45.

The spelling of 2661326063451 in words is "two trillion, six hundred sixty-one billion, three hundred twenty-six million, sixty-three thousand, four hundred fifty-one".