7661665776722 has 8 divisors (see below), whose sum is σ = 11492536017996. Its totient is φ = 3830820437392.

The previous prime is 7661665776701. The next prime is 7661665776733. The reversal of 7661665776722 is 2276775661667.

It can be written as a sum of positive squares in 2 ways, for example, as 7587055400521 + 74610376201 = 2754461^2 + 273149^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×7661665776722² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5436293 + ... + 6699000.

Almost surely, 2^{7661665776722} is an apocalyptic number.

7661665776722 is a deficient number, since it is larger than the sum of its proper divisors (3830870241274).

7661665776722 is a wasteful number, since it uses less digits than its factorization.

7661665776722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12450972.

The product of its digits is 373403520, while the sum is 68.

The spelling of 7661665776722 in words is "seven trillion, six hundred sixty-one billion, six hundred sixty-five million, seven hundred seventy-six thousand, seven hundred twenty-two".