73640663 has 2 divisors, whose sum is σ = 73640664. Its totient is φ = 73640662.

The previous prime is 73640627. The next prime is 73640711. The reversal of 73640663 is 36604637.

It is a weak prime.

It is an emirp because it is prime and its reverse (36604637) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73640663 - 2¹⁰ = 73639639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73640563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36820331 + 36820332.

It is an arithmetic number, because the mean of its divisors is an integer number (36820332).

Almost surely, 2^73640663 is an apocalyptic number.

73640663 is a deficient number, since it is larger than the sum of its proper divisors (1).

73640663 is an equidigital number, since it uses as much as digits as its factorization.

73640663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 35.

The square root of 73640663 is about 8581.4138112551. The cubic root of 73640663 is about 419.1529849589.

The spelling of 73640663 in words is "seventy-three million, six hundred forty thousand, six hundred sixty-three".