67267735022561 has 4 divisors (see below), whose sum is σ = 67277761521300. Its totient is φ = 67257708523824.

The previous prime is 67267735022557. The next prime is 67267735022693. The reversal of 67267735022561 is 16522053776276.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60455974318336 + 6811760704225 = 7775344^2 + 2609935^2 .

It is a cyclic number.

It is not a de Polignac number, because 67267735022561 - 2² = 67267735022557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67267735022561.

It is not an unprimeable number, because it can be changed into a prime (67267735022461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5013239306 + ... + 5013252723.

It is an arithmetic number, because the mean of its divisors is an integer number (16819440380325).

Almost surely, 2^{67267735022561} is an apocalyptic number.

It is an amenable number.

67267735022561 is a deficient number, since it is larger than the sum of its proper divisors (10026498739).

67267735022561 is a wasteful number, since it uses less digits than its factorization.

67267735022561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10026498738.

The product of its (nonzero) digits is 44452800, while the sum is 59.

The spelling of 67267735022561 in words is "sixty-seven trillion, two hundred sixty-seven billion, seven hundred thirty-five million, twenty-two thousand, five hundred sixty-one".