67675421025 has 189 divisors, whose sum is σ = 131764583113. Its totient is φ = 34464009600.

The previous prime is 67675421017. The next prime is 67675421027. The reversal of 67675421025 is 52012457676.

The square root of 67675421025 is 260145.

It is a perfect power (a square), and thus also a powerful number.

67675421025 is a `hidden beast` number, since 6 + 76 + 7 + 542 + 10 + 25 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 28485675729 + 39189745296 = 168777^2 + 197964^2 .

It is not a de Polignac number, because 67675421025 - 2³ = 67675421017 is a prime.

It is a super-2 number, since 2×67675421025² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67675421027) 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 188 ways as a sum of consecutive naturals, for example, 1439902552 + ... + 1439902598.

Almost surely, 2^67675421025 is an apocalyptic number.

67675421025 is the 260145-th square number.

67675421025 is the 130073-rd centered octagonal number.

It is an amenable number.

67675421025 is a deficient number, since it is larger than the sum of its proper divisors (64089162088).

67675421025 is an frugal number, since it uses more digits than its factorization.

67675421025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 67675421025 in words is "sixty-seven billion, six hundred seventy-five million, four hundred twenty-one thousand, twenty-five".