1666540324010 has 16 divisors (see below), whose sum is σ = 3002043441672. Its totient is φ = 666111494400.

The previous prime is 1666540323991. The next prime is 1666540324061. The reversal of 1666540324010 is 104230456661.

It can be written as a sum of positive squares in 4 ways, for example, as 1435541855881 + 230998468129 = 1198141^2 + 480623^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63065531 + ... + 63091950.

Almost surely, 2^{1666540324010} is an apocalyptic number.

1666540324010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1666540324010 is a deficient number, since it is larger than the sum of its proper divisors (1335503117662).

1666540324010 is a wasteful number, since it uses less digits than its factorization.

1666540324010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126158809.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 1666540324010 in words is "one trillion, six hundred sixty-six billion, five hundred forty million, three hundred twenty-four thousand, ten".