1662660656441 has 8 divisors (see below), whose sum is σ = 1666523438664. Its totient is φ = 1658800788480.

The previous prime is 1662660656341. The next prime is 1662660656443. The reversal of 1662660656441 is 1446560662661.

It can be written as a sum of positive squares in 4 ways, for example, as 11682367225 + 1650978289216 = 108085^2 + 1284904^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1662660656441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1662660656443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 415895 + ... + 1870371.

It is an arithmetic number, because the mean of its divisors is an integer number (208315429833).

Almost surely, 2^{1662660656441} is an apocalyptic number.

It is an amenable number.

1662660656441 is a deficient number, since it is larger than the sum of its proper divisors (3862782223).

1662660656441 is a wasteful number, since it uses less digits than its factorization.

1662660656441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457131.

The product of its (nonzero) digits is 7464960, while the sum is 53.

The spelling of 1662660656441 in words is "one trillion, six hundred sixty-two billion, six hundred sixty million, six hundred fifty-six thousand, four hundred forty-one".