1662788876649 has 8 divisors (see below), whose sum is σ = 2217893871072. Its totient is φ = 1108104900000.

The previous prime is 1662788876611. The next prime is 1662788876663. The reversal of 1662788876649 is 9466788872661.

It is a happy number.

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

It is not a de Polignac number, because 1662788876649 - 2¹⁶ = 1662788811113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1662788876149) 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, 105245227 + ... + 105261024.

It is an arithmetic number, because the mean of its divisors is an integer number (277236733884).

Almost surely, 2^{1662788876649} is an apocalyptic number.

It is an amenable number.

1662788876649 is a deficient number, since it is larger than the sum of its proper divisors (555104994423).

1662788876649 is a wasteful number, since it uses less digits than its factorization.

1662788876649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210508887.

The product of its digits is 2341011456, while the sum is 78.

The spelling of 1662788876649 in words is "one trillion, six hundred sixty-two billion, seven hundred eighty-eight million, eight hundred seventy-six thousand, six hundred forty-nine".