2662619987 has 2 divisors, whose sum is σ = 2662619988. Its totient is φ = 2662619986.

The previous prime is 2662619963. The next prime is 2662620041. The reversal of 2662619987 is 7899162662.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2662619987 is a prime.

It is not a weakly prime, because it can be changed into another prime (2662619957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1331309993 + 1331309994.

It is an arithmetic number, because the mean of its divisors is an integer number (1331309994).

Almost surely, 2^2662619987 is an apocalyptic number.

2662619987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2662619987 is an equidigital number, since it uses as much as digits as its factorization.

2662619987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 56.

The square root of 2662619987 is about 51600.5812661059. The cubic root of 2662619987 is about 1386.0207408399.

The spelling of 2662619987 in words is "two billion, six hundred sixty-two million, six hundred nineteen thousand, nine hundred eighty-seven".