7661004999 has 4 divisors (see below), whose sum is σ = 10214673336. Its totient is φ = 5107336664.

The previous prime is 7661004997. The next prime is 7661005031. The reversal of 7661004999 is 9994001667.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7661004999 - 2¹ = 7661004997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7661004997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1276834164 + ... + 1276834169.

It is an arithmetic number, because the mean of its divisors is an integer number (2553668334).

Almost surely, 2^7661004999 is an apocalyptic number.

7661004999 is a deficient number, since it is larger than the sum of its proper divisors (2553668337).

7661004999 is a wasteful number, since it uses less digits than its factorization.

7661004999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2553668336.

The product of its (nonzero) digits is 734832, while the sum is 51.

The square root of 7661004999 is about 87527.1672053883. The cubic root of 7661004999 is about 1971.3417297683.

The spelling of 7661004999 in words is "seven billion, six hundred sixty-one million, four thousand, nine hundred ninety-nine".