1660775966 has 8 divisors (see below), whose sum is σ = 2493097464. Its totient is φ = 829743480.

The previous prime is 1660775939. The next prime is 1660776049. The reversal of 1660775966 is 6695770661.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 319025 + ... + 324188.

It is an arithmetic number, because the mean of its divisors is an integer number (311637183).

Almost surely, 2^1660775966 is an apocalyptic number.

1660775966 is a deficient number, since it is larger than the sum of its proper divisors (832321498).

1660775966 is a wasteful number, since it uses less digits than its factorization.

1660775966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644506.

The product of its (nonzero) digits is 2857680, while the sum is 53.

The square root of 1660775966 is about 40752.6191305541. The cubic root of 1660775966 is about 1184.2326130009.

The spelling of 1660775966 in words is "one billion, six hundred sixty million, seven hundred seventy-five thousand, nine hundred sixty-six".