1660060651643 has 4 divisors (see below), whose sum is σ = 1660063265520. Its totient is φ = 1660058037768.

The previous prime is 1660060651609. The next prime is 1660060651649. The reversal of 1660060651643 is 3461560600661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1660060651643 - 2¹² = 1660060647547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1660060651594 and 1660060651603.

It is not an unprimeable number, because it can be changed into a prime (1660060651649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324746 + ... + 1850832.

It is an arithmetic number, because the mean of its divisors is an integer number (415015816380).

Almost surely, 2^{1660060651643} is an apocalyptic number.

1660060651643 is a deficient number, since it is larger than the sum of its proper divisors (2613877).

1660060651643 is a wasteful number, since it uses less digits than its factorization.

1660060651643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2613876.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 1660060651643 in words is "one trillion, six hundred sixty billion, sixty million, six hundred fifty-one thousand, six hundred forty-three".