1663077919860 has 72 divisors (see below), whose sum is σ = 5765336793216. Its totient is φ = 380132095680.

The previous prime is 1663077919817. The next prime is 1663077919879. The reversal of 1663077919860 is 689197703661.

1663077919860 is a `hidden beast` number, since 16 + 6 + 307 + 79 + 198 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 659950296 + ... + 659952815.

It is an arithmetic number, because the mean of its divisors is an integer number (80074122128).

Almost surely, 2^{1663077919860} is an apocalyptic number.

1663077919860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1663077919860 is an abundant number, since it is smaller than the sum of its proper divisors (4102258873356).

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

1663077919860 is a wasteful number, since it uses less digits than its factorization.

1663077919860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319903133 (or 1319903128 counting only the distinct ones).

The product of its (nonzero) digits is 20575296, while the sum is 63.

The spelling of 1663077919860 in words is "one trillion, six hundred sixty-three billion, seventy-seven million, nine hundred nineteen thousand, eight hundred sixty".