76466389 has 2 divisors, whose sum is σ = 76466390. Its totient is φ = 76466388.

The previous prime is 76466381. The next prime is 76466471. The reversal of 76466389 is 98366467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74684164 + 1782225 = 8642^2 + 1335^2 .

It is a cyclic number.

It is not a de Polignac number, because 76466389 - 2³ = 76466381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76466381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38233194 + 38233195.

It is an arithmetic number, because the mean of its divisors is an integer number (38233195).

Almost surely, 2^76466389 is an apocalyptic number.

It is an amenable number.

76466389 is a deficient number, since it is larger than the sum of its proper divisors (1).

76466389 is an equidigital number, since it uses as much as digits as its factorization.

76466389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 49.

The square root of 76466389 is about 8744.5062181921. The cubic root of 76466389 is about 424.4470576126.

The spelling of 76466389 in words is "seventy-six million, four hundred sixty-six thousand, three hundred eighty-nine".