67670657 has 2 divisors, whose sum is σ = 67670658. Its totient is φ = 67670656.

The previous prime is 67670653. The next prime is 67670663. The reversal of 67670657 is 75607676.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67634176 + 36481 = 8224^2 + 191^2 .

It is a cyclic number.

It is not a de Polignac number, because 67670657 - 2² = 67670653 is a prime.

It is not a weakly prime, because it can be changed into another prime (67670653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33835328 + 33835329.

It is an arithmetic number, because the mean of its divisors is an integer number (33835329).

Almost surely, 2^67670657 is an apocalyptic number.

It is an amenable number.

67670657 is a deficient number, since it is larger than the sum of its proper divisors (1).

67670657 is an equidigital number, since it uses as much as digits as its factorization.

67670657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 370440, while the sum is 44.

The square root of 67670657 is about 8226.2176606263. The cubic root of 67670657 is about 407.5054902845.

The spelling of 67670657 in words is "sixty-seven million, six hundred seventy thousand, six hundred fifty-seven".