2412667661 has 2 divisors, whose sum is σ = 2412667662. Its totient is φ = 2412667660.

The previous prime is 2412667651. The next prime is 2412667679. The reversal of 2412667661 is 1667662142.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2133978025 + 278689636 = 46195^2 + 16694^2 .

It is a cyclic number.

It is not a de Polignac number, because 2412667661 - 2¹⁰ = 2412666637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2412667601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1206333830 + 1206333831.

It is an arithmetic number, because the mean of its divisors is an integer number (1206333831).

Almost surely, 2^2412667661 is an apocalyptic number.

It is an amenable number.

2412667661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2412667661 is an equidigital number, since it uses as much as digits as its factorization.

2412667661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The square root of 2412667661 is about 49118.9134753610. The cubic root of 2412667661 is about 1341.2173649748.

The spelling of 2412667661 in words is "two billion, four hundred twelve million, six hundred sixty-seven thousand, six hundred sixty-one".