1661050799 has 2 divisors, whose sum is σ = 1661050800. Its totient is φ = 1661050798.

The previous prime is 1661050771. The next prime is 1661050837. The reversal of 1661050799 is 9970501661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1661050799 - 2⁸ = 1661050543 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1661050759) 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, 830525399 + 830525400.

It is an arithmetic number, because the mean of its divisors is an integer number (830525400).

Almost surely, 2^1661050799 is an apocalyptic number.

1661050799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1661050799 is an equidigital number, since it uses as much as digits as its factorization.

1661050799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 1661050799 is about 40755.9909583855. The cubic root of 1661050799 is about 1184.2979335211.

The spelling of 1661050799 in words is "one billion, six hundred sixty-one million, fifty thousand, seven hundred ninety-nine".