67110661 has 2 divisors, whose sum is σ = 67110662. Its totient is φ = 67110660.

The previous prime is 67110653. The next prime is 67110677. The reversal of 67110661 is 16601176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35402500 + 31708161 = 5950^2 + 5631^2 .

It is a cyclic number.

It is not a de Polignac number, because 67110661 - 2³ = 67110653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67110601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33555330 + 33555331.

It is an arithmetic number, because the mean of its divisors is an integer number (33555331).

Almost surely, 2^67110661 is an apocalyptic number.

It is an amenable number.

67110661 is a deficient number, since it is larger than the sum of its proper divisors (1).

67110661 is an equidigital number, since it uses as much as digits as its factorization.

67110661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 67110661 is about 8192.1096794416. The cubic root of 67110661 is about 406.3782964887.

The spelling of 67110661 in words is "sixty-seven million, one hundred ten thousand, six hundred sixty-one".