1660561206 has 16 divisors (see below), whose sum is σ = 3367899648. Its totient is φ = 545724200.

The previous prime is 1660561193. The next prime is 1660561289. The reversal of 1660561206 is 6021650661.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 1948590 + ... + 1949441.

It is an arithmetic number, because the mean of its divisors is an integer number (210493728).

Almost surely, 2^1660561206 is an apocalyptic number.

1660561206 is an abundant number, since it is smaller than the sum of its proper divisors (1707338442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1660561206 is a wasteful number, since it uses less digits than its factorization.

1660561206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3898107.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 1660561206 is about 40749.9841226963. The cubic root of 1660561206 is about 1184.1815652247.

The spelling of 1660561206 in words is "one billion, six hundred sixty million, five hundred sixty-one thousand, two hundred six".