67929882521 has 2 divisors, whose sum is σ = 67929882522. Its totient is φ = 67929882520.

The previous prime is 67929882469. The next prime is 67929882607. The reversal of 67929882521 is 12528892976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59663436121 + 8266446400 = 244261^2 + 90920^2 .

It is a cyclic number.

It is not a de Polignac number, because 67929882521 - 2²² = 67925688217 is a prime.

It is a super-2 number, since 2×67929882521² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67929882121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33964941260 + 33964941261.

It is an arithmetic number, because the mean of its divisors is an integer number (33964941261).

Almost surely, 2^67929882521 is an apocalyptic number.

It is an amenable number.

67929882521 is a deficient number, since it is larger than the sum of its proper divisors (1).

67929882521 is an equidigital number, since it uses as much as digits as its factorization.

67929882521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8709120, while the sum is 59.

The spelling of 67929882521 in words is "sixty-seven billion, nine hundred twenty-nine million, eight hundred eighty-two thousand, five hundred twenty-one".