1665454561416 has 96 divisors (see below), whose sum is σ = 4516419648000. Its totient is φ = 554436513792.

The previous prime is 1665454561399. The next prime is 1665454561439. The reversal of 1665454561416 is 6141654545661.

1665454561416 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 4 + 5 + 4 + 5 + 614 + 16 = 666.

It is a super-2 number, since 2×1665454561416² (a number of 25 digits) contains 22 as substring.

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, 255082440 + ... + 255088968.

It is an arithmetic number, because the mean of its divisors is an integer number (47046038000).

Almost surely, 2^{1665454561416} is an apocalyptic number.

It is an amenable number.

1665454561416 is an abundant number, since it is smaller than the sum of its proper divisors (2850965086584).

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

1665454561416 is a wasteful number, since it uses less digits than its factorization.

1665454561416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10563 (or 10556 counting only the distinct ones).

The product of its digits is 10368000, while the sum is 54.

The spelling of 1665454561416 in words is "one trillion, six hundred sixty-five billion, four hundred fifty-four million, five hundred sixty-one thousand, four hundred sixteen".