1660261347600 has 60 divisors (see below), whose sum is σ = 5318370520656. Its totient is φ = 442736359040.

The previous prime is 1660261347551. The next prime is 1660261347611. The reversal of 1660261347600 is 67431620661.

It is a tau number, because it is divible by the number of its divisors (60).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 691774362 + ... + 691776761.

Almost surely, 2^{1660261347600} is an apocalyptic number.

1660261347600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1660261347600 is an abundant number, since it is smaller than the sum of its proper divisors (3658109173056).

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

1660261347600 is a wasteful number, since it uses less digits than its factorization.

1660261347600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383551144 (or 1383551133 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The spelling of 1660261347600 in words is "one trillion, six hundred sixty billion, two hundred sixty-one million, three hundred forty-seven thousand, six hundred".