1665012913005 has 32 divisors (see below), whose sum is σ = 2935665000576. Its totient is φ = 800635901184.

The previous prime is 1665012912989. The next prime is 1665012913007. The reversal of 1665012913005 is 5003192105661.

It is a happy number.

It is not a de Polignac number, because 1665012913005 - 2⁴ = 1665012912989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665012913007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99276822 + ... + 99293591.

It is an arithmetic number, because the mean of its divisors is an integer number (91739531268).

Almost surely, 2^{1665012913005} is an apocalyptic number.

1665012913005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1665012913005 is a deficient number, since it is larger than the sum of its proper divisors (1270652087571).

1665012913005 is a wasteful number, since it uses less digits than its factorization.

1665012913005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198570477.

The product of its (nonzero) digits is 48600, while the sum is 39.

The spelling of 1665012913005 in words is "one trillion, six hundred sixty-five billion, twelve million, nine hundred thirteen thousand, five".