67766663 has 2 divisors, whose sum is σ = 67766664. Its totient is φ = 67766662.

The previous prime is 67766627. The next prime is 67766683. The reversal of 67766663 is 36666776.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67766663 - 2¹⁴ = 67750279 is a prime.

It is a super-2 number, since 2×67766663² = 9184641228311138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67766603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33883331 + 33883332.

It is an arithmetic number, because the mean of its divisors is an integer number (33883332).

Almost surely, 2^67766663 is an apocalyptic number.

67766663 is a deficient number, since it is larger than the sum of its proper divisors (1).

67766663 is an equidigital number, since it uses as much as digits as its factorization.

67766663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 47.

The square root of 67766663 is about 8232.0509595119. The cubic root of 67766663 is about 407.6981118570.

The spelling of 67766663 in words is "sixty-seven million, seven hundred sixty-six thousand, six hundred sixty-three".