1666727022610 has 16 divisors (see below), whose sum is σ = 3230886228696. Its totient is φ = 615406900608.

The previous prime is 1666727022581. The next prime is 1666727022677. The reversal of 1666727022610 is 162207276661.

It can be written as a sum of positive squares in 4 ways, for example, as 660190375441 + 1006536647169 = 812521^2 + 1003263^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6410488419 + ... + 6410488678.

Almost surely, 2^{1666727022610} is an apocalyptic number.

1666727022610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1666727022610 is a deficient number, since it is larger than the sum of its proper divisors (1564159206086).

1666727022610 is a wasteful number, since it uses less digits than its factorization.

1666727022610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12820977117.

The product of its (nonzero) digits is 508032, while the sum is 46.

The spelling of 1666727022610 in words is "one trillion, six hundred sixty-six billion, seven hundred twenty-seven million, twenty-two thousand, six hundred ten".