7766650321 has 2 divisors, whose sum is σ = 7766650322. Its totient is φ = 7766650320.

The previous prime is 7766650301. The next prime is 7766650351. The reversal of 7766650321 is 1230566677.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6832675600 + 933974721 = 82660^2 + 30561^2 .

It is a cyclic number.

It is not a de Polignac number, because 7766650321 - 2¹⁵ = 7766617553 is a prime.

It is not a weakly prime, because it can be changed into another prime (7766650301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3883325160 + 3883325161.

It is an arithmetic number, because the mean of its divisors is an integer number (3883325161).

Almost surely, 2^7766650321 is an apocalyptic number.

It is an amenable number.

7766650321 is a deficient number, since it is larger than the sum of its proper divisors (1).

7766650321 is an equidigital number, since it uses as much as digits as its factorization.

7766650321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 43.

The square root of 7766650321 is about 88128.6010384824. The cubic root of 7766650321 is about 1980.3619989929.

The spelling of 7766650321 in words is "seven billion, seven hundred sixty-six million, six hundred fifty thousand, three hundred twenty-one".