1666676534240 has 48 divisors (see below), whose sum is σ = 3938036075568. Its totient is φ = 666583796736.

The previous prime is 1666676534111. The next prime is 1666676534287. The reversal of 1666676534240 is 424356766661.

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, 561284 + ... + 1910076.

It is an arithmetic number, because the mean of its divisors is an integer number (82042418241).

Almost surely, 2^{1666676534240} is an apocalyptic number.

1666676534240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666676534240 is an abundant number, since it is smaller than the sum of its proper divisors (2271359541328).

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

1666676534240 is a wasteful number, since it uses less digits than its factorization.

1666676534240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356531 (or 1356523 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 56.

The spelling of 1666676534240 in words is "one trillion, six hundred sixty-six billion, six hundred seventy-six million, five hundred thirty-four thousand, two hundred forty".