1665510661016 has 48 divisors (see below), whose sum is σ = 3234756765240. Its totient is φ = 803908582400.

The previous prime is 1665510660953. The next prime is 1665510661057. The reversal of 1665510661016 is 6101660155661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50759816 + ... + 50792616.

Almost surely, 2^{1665510661016} is an apocalyptic number.

It is an amenable number.

1665510661016 is a deficient number, since it is larger than the sum of its proper divisors (1569246104224).

1665510661016 is a wasteful number, since it uses less digits than its factorization.

1665510661016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40412 (or 40379 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 1665510661016 in words is "one trillion, six hundred sixty-five billion, five hundred ten million, six hundred sixty-one thousand, sixteen".