1966290866576 has 10 divisors (see below), whose sum is σ = 3809688554022. Its totient is φ = 983145433280.

The previous prime is 1966290866567. The next prime is 1966290866611. The reversal of 1966290866576 is 6756680926691.

It can be written as a sum of positive squares in only one way, i.e., 1685645208976 + 280645657600 = 1298324^2 + 529760^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61446589565 + ... + 61446589596.

Almost surely, 2^{1966290866576} is an apocalyptic number.

1966290866576 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1966290866576 is a deficient number, since it is larger than the sum of its proper divisors (1843397687446).

1966290866576 is a wasteful number, since it uses less digits than its factorization.

1966290866576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122893179169 (or 122893179163 counting only the distinct ones).

The product of its (nonzero) digits is 352719360, while the sum is 71.

The spelling of 1966290866576 in words is "one trillion, nine hundred sixty-six billion, two hundred ninety million, eight hundred sixty-six thousand, five hundred seventy-six".