1665263406027 has 32 divisors (see below), whose sum is σ = 2407498329600. Its totient is φ = 1017772876800.

The previous prime is 1665263405989. The next prime is 1665263406041. The reversal of 1665263406027 is 7206043625661.

It is not a de Polignac number, because 1665263406027 - 2¹⁸ = 1665263143883 is a prime.

It is a super-2 number, since 2×1665263406027² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1665263406067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30000283 + ... + 30055739.

It is an arithmetic number, because the mean of its divisors is an integer number (75234322800).

Almost surely, 2^{1665263406027} is an apocalyptic number.

1665263406027 is a deficient number, since it is larger than the sum of its proper divisors (742234923573).

1665263406027 is a wasteful number, since it uses less digits than its factorization.

1665263406027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60723.

The product of its (nonzero) digits is 2177280, while the sum is 48.

The spelling of 1665263406027 in words is "one trillion, six hundred sixty-five billion, two hundred sixty-three million, four hundred six thousand, twenty-seven".