761406661 has 4 divisors (see below), whose sum is σ = 771044800. Its totient is φ = 751768524.

The previous prime is 761406647. The next prime is 761406673. The reversal of 761406661 is 166604167.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 761406661 - 2¹⁹ = 760882373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 761406661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (761406601) 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 in 3 ways as a sum of consecutive naturals, for example, 4818951 + ... + 4819108.

It is an arithmetic number, because the mean of its divisors is an integer number (192761200).

Almost surely, 2^761406661 is an apocalyptic number.

It is an amenable number.

761406661 is a deficient number, since it is larger than the sum of its proper divisors (9638139).

761406661 is an equidigital number, since it uses as much as digits as its factorization.

761406661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9638138.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 761406661 is about 27593.5981887104. The cubic root of 761406661 is about 913.1432026337.

The spelling of 761406661 in words is "seven hundred sixty-one million, four hundred six thousand, six hundred sixty-one".