67246026561 has 18 divisors (see below), whose sum is σ = 112991623602. Its totient is φ = 38426300640.

The previous prime is 67246026511. The next prime is 67246026571. The reversal of 67246026561 is 16562064276.

67246026561 is a `hidden beast` number, since 6 + 7 + 2 + 4 + 60 + 26 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 62828430336 + 4417596225 = 250656^2 + 66465^2 .

It is not a de Polignac number, because 67246026561 - 2¹⁴ = 67246010177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67246026511) 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 17 ways as a sum of consecutive naturals, for example, 76242220 + ... + 76243101.

Almost surely, 2^67246026561 is an apocalyptic number.

It is an amenable number.

67246026561 is a deficient number, since it is larger than the sum of its proper divisors (45745597041).

67246026561 is a wasteful number, since it uses less digits than its factorization.

67246026561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152485341 (or 152485331 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 67246026561 in words is "sixty-seven billion, two hundred forty-six million, twenty-six thousand, five hundred sixty-one".