1665960062865 has 256 divisors, whose sum is σ = 3276370944000. Its totient is φ = 706956042240.

The previous prime is 1665960062857. The next prime is 1665960062881. The reversal of 1665960062865 is 5682600695661.

It is not a de Polignac number, because 1665960062865 - 2³ = 1665960062857 is a prime.

It is a super-2 number, since 2×1665960062865² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1665960062799 and 1665960062808.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 2528011906 + ... + 2528012564.

It is an arithmetic number, because the mean of its divisors is an integer number (12798324000).

Almost surely, 2^{1665960062865} is an apocalyptic number.

1665960062865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1665960062865 is a deficient number, since it is larger than the sum of its proper divisors (1610410881135).

1665960062865 is a wasteful number, since it uses less digits than its factorization.

1665960062865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080.

The product of its (nonzero) digits is 27993600, while the sum is 60.

The spelling of 1665960062865 in words is "one trillion, six hundred sixty-five billion, nine hundred sixty million, sixty-two thousand, eight hundred sixty-five".