2999661887 has 2 divisors, whose sum is σ = 2999661888. Its totient is φ = 2999661886.

The previous prime is 2999661869. The next prime is 2999661911. The reversal of 2999661887 is 7881669992.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2999661887 - 2¹⁶ = 2999596351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2999664887) 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, 1499830943 + 1499830944.

It is an arithmetic number, because the mean of its divisors is an integer number (1499830944).

Almost surely, 2^2999661887 is an apocalyptic number.

2999661887 is a deficient number, since it is larger than the sum of its proper divisors (1).

2999661887 is an equidigital number, since it uses as much as digits as its factorization.

2999661887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23514624, while the sum is 65.

The square root of 2999661887 is about 54769.1691282605. The cubic root of 2999661887 is about 1442.1953856796.

The spelling of 2999661887 in words is "two billion, nine hundred ninety-nine million, six hundred sixty-one thousand, eight hundred eighty-seven".