67298757381 has 12 divisors (see below), whose sum is σ = 97261240908. Its totient is φ = 44841873024.

The previous prime is 67298757371. The next prime is 67298757439. The reversal of 67298757381 is 18375789276.

67298757381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 30613101156 + 36685656225 = 174966^2 + 191535^2 .

It is not a de Polignac number, because 67298757381 - 2⁹ = 67298756869 is a prime.

It is a super-2 number, since 2×67298757381² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67298757311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1979310 + ... + 2013023.

It is an arithmetic number, because the mean of its divisors is an integer number (8105103409).

Almost surely, 2^67298757381 is an apocalyptic number.

It is an amenable number.

67298757381 is a deficient number, since it is larger than the sum of its proper divisors (29962483527).

67298757381 is a wasteful number, since it uses less digits than its factorization.

67298757381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3994212 (or 3994209 counting only the distinct ones).

The product of its digits is 35562240, while the sum is 63.

The spelling of 67298757381 in words is "sixty-seven billion, two hundred ninety-eight million, seven hundred fifty-seven thousand, three hundred eighty-one".