1666460742740 has 24 divisors (see below), whose sum is σ = 3499597424232. Its totient is φ = 666578608640.

The previous prime is 1666460742707. The next prime is 1666460742787. The reversal of 1666460742740 is 472470646661.

It can be written as a sum of positive squares in 4 ways, for example, as 61359253264 + 1605101489476 = 247708^2 + 1266926^2 .

It is a congruent number.

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, 2678000 + ... + 3241080.

It is an arithmetic number, because the mean of its divisors is an integer number (145816559343).

Almost surely, 2^{1666460742740} is an apocalyptic number.

1666460742740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666460742740 is an abundant number, since it is smaller than the sum of its proper divisors (1833136681492).

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

1666460742740 is a wasteful number, since it uses less digits than its factorization.

1666460742740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711067 (or 711065 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 53.

The spelling of 1666460742740 in words is "one trillion, six hundred sixty-six billion, four hundred sixty million, seven hundred forty-two thousand, seven hundred forty".