2661956467 has 2 divisors, whose sum is σ = 2661956468. Its totient is φ = 2661956466.

The previous prime is 2661956419. The next prime is 2661956489. The reversal of 2661956467 is 7646591662.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2661956467 is a prime.

It is not a weakly prime, because it can be changed into another prime (2661956567) 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, 1330978233 + 1330978234.

It is an arithmetic number, because the mean of its divisors is an integer number (1330978234).

Almost surely, 2^2661956467 is an apocalyptic number.

2661956467 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661956467 is an equidigital number, since it uses as much as digits as its factorization.

2661956467 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 52.

The square root of 2661956467 is about 51594.1514805700. The cubic root of 2661956467 is about 1385.9056000025.

The spelling of 2661956467 in words is "two billion, six hundred sixty-one million, nine hundred fifty-six thousand, four hundred sixty-seven".