761440663 has 2 divisors, whose sum is σ = 761440664. Its totient is φ = 761440662.

The previous prime is 761440661. The next prime is 761440679. The reversal of 761440663 is 366044167.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 761440663 - 2¹ = 761440661 is a prime.

Together with 761440661, it forms a pair of twin primes.

It is equal to p_39262627 and since 761440663 and 39262627 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (761440661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 380720331 + 380720332.

It is an arithmetic number, because the mean of its divisors is an integer number (380720332).

Almost surely, 2^761440663 is an apocalyptic number.

761440663 is a deficient number, since it is larger than the sum of its proper divisors (1).

761440663 is an equidigital number, since it uses as much as digits as its factorization.

761440663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 761440663 is about 27594.2143030020. The cubic root of 761440663 is about 913.1567951218.

The spelling of 761440663 in words is "seven hundred sixty-one million, four hundred forty thousand, six hundred sixty-three".