1660656164656 has 10 divisors (see below), whose sum is σ = 3217521319052. Its totient is φ = 830328082320.

The previous prime is 1660656164647. The next prime is 1660656164659. The reversal of 1660656164656 is 6564616560661.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1660656164656.

It is not an unprimeable number, because it can be changed into a prime (1660656164659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51895505130 + ... + 51895505161.

Almost surely, 2^{1660656164656} is an apocalyptic number.

1660656164656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1660656164656 is a deficient number, since it is larger than the sum of its proper divisors (1556865154396).

1660656164656 is a wasteful number, since it uses less digits than its factorization.

1660656164656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103791010299 (or 103791010293 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 58.

The spelling of 1660656164656 in words is "one trillion, six hundred sixty billion, six hundred fifty-six million, one hundred sixty-four thousand, six hundred fifty-six".