1665801234105 has 32 divisors (see below), whose sum is σ = 2691143820288. Its totient is φ = 879834571200.

The previous prime is 1665801234089. The next prime is 1665801234137. The reversal of 1665801234105 is 5014321085661.

It is not a de Polignac number, because 1665801234105 - 2⁴ = 1665801234089 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86590 + ... + 1827320.

It is an arithmetic number, because the mean of its divisors is an integer number (84098244384).

Almost surely, 2^{1665801234105} is an apocalyptic number.

1665801234105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1665801234105 is a deficient number, since it is larger than the sum of its proper divisors (1025342586183).

1665801234105 is a wasteful number, since it uses less digits than its factorization.

1665801234105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741357.

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 1665801234105 in words is "one trillion, six hundred sixty-five billion, eight hundred one million, two hundred thirty-four thousand, one hundred five".