67626561 has 32 divisors (see below), whose sum is σ = 98910720. Its totient is φ = 40933376.

The previous prime is 67626553. The next prime is 67626563. The reversal of 67626561 is 16562676.

It is a cyclic number.

It is not a de Polignac number, because 67626561 - 2³ = 67626553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67626563) 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 in 31 ways as a sum of consecutive naturals, for example, 213175 + ... + 213491.

It is an arithmetic number, because the mean of its divisors is an integer number (3090960).

Almost surely, 2^67626561 is an apocalyptic number.

It is an amenable number.

67626561 is a deficient number, since it is larger than the sum of its proper divisors (31284159).

67626561 is a wasteful number, since it uses less digits than its factorization.

67626561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473.

The product of its digits is 90720, while the sum is 39.

The square root of 67626561 is about 8223.5370127458. The cubic root of 67626561 is about 407.4169572461.

The spelling of 67626561 in words is "sixty-seven million, six hundred twenty-six thousand, five hundred sixty-one".