7669977881 has 2 divisors, whose sum is σ = 7669977882. Its totient is φ = 7669977880.

The previous prime is 7669977859. The next prime is 7669977899. The reversal of 7669977881 is 1887799667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6774771481 + 895206400 = 82309^2 + 29920^2 .

It is a cyclic number.

It is not a de Polignac number, because 7669977881 - 2¹⁸ = 7669715737 is a prime.

It is a super-2 number, since 2×7669977881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7669977841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3834988940 + 3834988941.

It is an arithmetic number, because the mean of its divisors is an integer number (3834988941).

Almost surely, 2^7669977881 is an apocalyptic number.

It is an amenable number.

7669977881 is a deficient number, since it is larger than the sum of its proper divisors (1).

7669977881 is an equidigital number, since it uses as much as digits as its factorization.

7669977881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64012032, while the sum is 68.

The square root of 7669977881 is about 87578.4099022128. The cubic root of 7669977881 is about 1972.1110681401. Note that the first 3 decimals are identical.

The spelling of 7669977881 in words is "seven billion, six hundred sixty-nine million, nine hundred seventy-seven thousand, eight hundred eighty-one".