1661050879 has 8 divisors (see below), whose sum is σ = 1707073088. Its totient is φ = 1615088160.

The previous prime is 1661050873. The next prime is 1661050901. The reversal of 1661050879 is 9780501661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1661050879 - 2¹⁵ = 1661018111 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661050873) 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 in 7 ways as a sum of consecutive naturals, for example, 45034 + ... + 73144.

It is an arithmetic number, because the mean of its divisors is an integer number (213384136).

Almost surely, 2^1661050879 is an apocalyptic number.

1661050879 is a deficient number, since it is larger than the sum of its proper divisors (46022209).

1661050879 is a wasteful number, since it uses less digits than its factorization.

1661050879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29745.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 1661050879 is about 40755.9919398363. The cubic root of 1661050879 is about 1184.2979525339.

The spelling of 1661050879 in words is "one billion, six hundred sixty-one million, fifty thousand, eight hundred seventy-nine".