67664011 has 2 divisors, whose sum is σ = 67664012. Its totient is φ = 67664010.

The previous prime is 67663993. The next prime is 67664021. The reversal of 67664011 is 11046676.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67664011 is a prime.

It is not a weakly prime, because it can be changed into another prime (67664021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33832005 + 33832006.

It is an arithmetic number, because the mean of its divisors is an integer number (33832006).

Almost surely, 2^67664011 is an apocalyptic number.

67664011 is a deficient number, since it is larger than the sum of its proper divisors (1).

67664011 is an equidigital number, since it uses as much as digits as its factorization.

67664011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 67664011 is about 8225.8136983523. The cubic root of 67664011 is about 407.4921493463.

The spelling of 67664011 in words is "sixty-seven million, six hundred sixty-four thousand, eleven".