2661821467 has 2 divisors, whose sum is σ = 2661821468. Its totient is φ = 2661821466.

The previous prime is 2661821447. The next prime is 2661821483. The reversal of 2661821467 is 7641281662.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2661821467 is a prime.

It is not a weakly prime, because it can be changed into another prime (2661821447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330910733 + 1330910734.

It is an arithmetic number, because the mean of its divisors is an integer number (1330910734).

Almost surely, 2^2661821467 is an apocalyptic number.

2661821467 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661821467 is an equidigital number, since it uses as much as digits as its factorization.

2661821467 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 43.

The square root of 2661821467 is about 51592.8431761616. The cubic root of 2661821467 is about 1385.8821710671.

The spelling of 2661821467 in words is "two billion, six hundred sixty-one million, eight hundred twenty-one thousand, four hundred sixty-seven".