2661230056651 has 4 divisors (see below), whose sum is σ = 2776935711312. Its totient is φ = 2545524401992.

The previous prime is 2661230056621. The next prime is 2661230056669. The reversal of 2661230056651 is 1566500321662.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2661230056651 - 2¹⁹ = 2661229532363 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2661230056598 and 2661230056607.

It is not an unprimeable number, because it can be changed into a prime (2661230056621) 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, 57852827296 + ... + 57852827341.

It is an arithmetic number, because the mean of its divisors is an integer number (694233927828).

Almost surely, 2^{2661230056651} is an apocalyptic number.

2661230056651 is a deficient number, since it is larger than the sum of its proper divisors (115705654661).

2661230056651 is a wasteful number, since it uses less digits than its factorization.

2661230056651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115705654660.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 2661230056651 in words is "two trillion, six hundred sixty-one billion, two hundred thirty million, fifty-six thousand, six hundred fifty-one".