76666543 has 2 divisors, whose sum is σ = 76666544. Its totient is φ = 76666542.

The previous prime is 76666537. The next prime is 76666591. The reversal of 76666543 is 34566667.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 76666543 - 2⁵ = 76666511 is a prime.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 76666543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76666043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38333271 + 38333272.

It is an arithmetic number, because the mean of its divisors is an integer number (38333272).

Almost surely, 2^76666543 is an apocalyptic number.

76666543 is a deficient number, since it is larger than the sum of its proper divisors (1).

76666543 is an equidigital number, since it uses as much as digits as its factorization.

76666543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 43.

The square root of 76666543 is about 8755.9432958420. The cubic root of 76666543 is about 424.8170709864.

The spelling of 76666543 in words is "seventy-six million, six hundred sixty-six thousand, five hundred forty-three".