67680551 has 2 divisors, whose sum is σ = 67680552. Its totient is φ = 67680550.

The previous prime is 67680499. The next prime is 67680583. The reversal of 67680551 is 15508676.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67680551 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67682551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33840275 + 33840276.

It is an arithmetic number, because the mean of its divisors is an integer number (33840276).

Almost surely, 2^67680551 is an apocalyptic number.

67680551 is a deficient number, since it is larger than the sum of its proper divisors (1).

67680551 is an equidigital number, since it uses as much as digits as its factorization.

67680551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 67680551 is about 8226.8190085841. The cubic root of 67680551 is about 407.5253495214.

The spelling of 67680551 in words is "sixty-seven million, six hundred eighty thousand, five hundred fifty-one".