67674521 has 2 divisors, whose sum is σ = 67674522. Its totient is φ = 67674520.

The previous prime is 67674511. The next prime is 67674539. The reversal of 67674521 is 12547676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37027225 + 30647296 = 6085^2 + 5536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67674521 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (67674511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33837260 + 33837261.

It is an arithmetic number, because the mean of its divisors is an integer number (33837261).

Almost surely, 2^67674521 is an apocalyptic number.

It is an amenable number.

67674521 is a deficient number, since it is larger than the sum of its proper divisors (1).

67674521 is an equidigital number, since it uses as much as digits as its factorization.

67674521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 38.

The square root of 67674521 is about 8226.4525161214. The cubic root of 67674521 is about 407.5132463357.

The spelling of 67674521 in words is "sixty-seven million, six hundred seventy-four thousand, five hundred twenty-one".