67643617481476 has 27 divisors (see below), whose sum is σ = 122599894241461. Its totient is φ = 32655309185744.

The previous prime is 67643617481417. The next prime is 67643617481501. The reversal of 67643617481476 is 67418471634676.

The square root of 67643617481476 is 8224574.

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

It can be written as a sum of positive squares in only one way, i.e., 35470672187076 + 32172945294400 = 5955726^2 + 5672120^2 .

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 476954391 + ... + 477096193.

Almost surely, 2^{67643617481476} is an apocalyptic number.

67643617481476 is the 8224574-th square number.

It is an amenable number.

67643617481476 is a deficient number, since it is larger than the sum of its proper divisors (54956276759985).

67643617481476 is an frugal number, since it uses more digits than its factorization.

67643617481476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283668 (or 141834 counting only the distinct ones).

The product of its digits is 682795008, while the sum is 70.

The spelling of 67643617481476 in words is "sixty-seven trillion, six hundred forty-three billion, six hundred seventeen million, four hundred eighty-one thousand, four hundred seventy-six".