67772756423 has 2 divisors, whose sum is σ = 67772756424. Its totient is φ = 67772756422.

The previous prime is 67772756413. The next prime is 67772756453. The reversal of 67772756423 is 32465727776.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67772756423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67772756413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33886378211 + 33886378212.

It is an arithmetic number, because the mean of its divisors is an integer number (33886378212).

Almost surely, 2^67772756423 is an apocalyptic number.

67772756423 is a deficient number, since it is larger than the sum of its proper divisors (1).

67772756423 is an equidigital number, since it uses as much as digits as its factorization.

67772756423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20744640, while the sum is 56.

The spelling of 67772756423 in words is "sixty-seven billion, seven hundred seventy-two million, seven hundred fifty-six thousand, four hundred twenty-three".