2661972623 has 2 divisors, whose sum is σ = 2661972624. Its totient is φ = 2661972622.

The previous prime is 2661972617. The next prime is 2661972629. The reversal of 2661972623 is 3262791662.

It is a balanced prime because it is at equal distance from previous prime (2661972617) and next prime (2661972629).

It is a cyclic number.

It is not a de Polignac number, because 2661972623 - 2⁶ = 2661972559 is a prime.

It is a super-3 number, since 3×2661972623³ (a number of 29 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2661972629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330986311 + 1330986312.

It is an arithmetic number, because the mean of its divisors is an integer number (1330986312).

Almost surely, 2^2661972623 is an apocalyptic number.

2661972623 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661972623 is an equidigital number, since it uses as much as digits as its factorization.

2661972623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 44.

The square root of 2661972623 is about 51594.3080484660. The cubic root of 2661972623 is about 1385.9084037856.

The spelling of 2661972623 in words is "two billion, six hundred sixty-one million, nine hundred seventy-two thousand, six hundred twenty-three".