76806553 has 2 divisors, whose sum is σ = 76806554. Its totient is φ = 76806552.

The previous prime is 76806551. The next prime is 76806559. The reversal of 76806553 is 35560867.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76790169 + 16384 = 8763^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 76806553 - 2¹ = 76806551 is a prime.

Together with 76806551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (76806551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38403276 + 38403277.

It is an arithmetic number, because the mean of its divisors is an integer number (38403277).

Almost surely, 2^76806553 is an apocalyptic number.

It is an amenable number.

76806553 is a deficient number, since it is larger than the sum of its proper divisors (1).

76806553 is an equidigital number, since it uses as much as digits as its factorization.

76806553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 76806553 is about 8763.9347898076. The cubic root of 76806553 is about 425.0755169153.

The spelling of 76806553 in words is "seventy-six million, eight hundred six thousand, five hundred fifty-three".