67520220091 has 2 divisors, whose sum is σ = 67520220092. Its totient is φ = 67520220090.

The previous prime is 67520220017. The next prime is 67520220107. The reversal of 67520220091 is 19002202576.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67520220091 - 2⁹ = 67520219579 is a prime.

It is a super-2 number, since 2×67520220091² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67520220191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33760110045 + 33760110046.

It is an arithmetic number, because the mean of its divisors is an integer number (33760110046).

Almost surely, 2^67520220091 is an apocalyptic number.

67520220091 is a deficient number, since it is larger than the sum of its proper divisors (1).

67520220091 is an equidigital number, since it uses as much as digits as its factorization.

67520220091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 67520220091 in words is "sixty-seven billion, five hundred twenty million, two hundred twenty thousand, ninety-one".