665127873301 has 4 divisors (see below), whose sum is σ = 694046476512. Its totient is φ = 636209270092.

The previous prime is 665127873239. The next prime is 665127873317. The reversal of 665127873301 is 103378721566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 103378721566 = 2 ⋅51689360783.

It is a cyclic number.

It is not a de Polignac number, because 665127873301 - 2³⁵ = 630768134933 is a prime.

It is a super-2 number, since 2×665127873301² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665127873701) 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 3 ways as a sum of consecutive naturals, for example, 14459301571 + ... + 14459301616.

It is an arithmetic number, because the mean of its divisors is an integer number (173511619128).

Almost surely, 2^665127873301 is an apocalyptic number.

It is an amenable number.

665127873301 is a deficient number, since it is larger than the sum of its proper divisors (28918603211).

665127873301 is a wasteful number, since it uses less digits than its factorization.

665127873301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28918603210.

The product of its (nonzero) digits is 1270080, while the sum is 49.

The spelling of 665127873301 in words is "six hundred sixty-five billion, one hundred twenty-seven million, eight hundred seventy-three thousand, three hundred one".