770663681 has 8 divisors (see below), whose sum is σ = 789349440. Its totient is φ = 752189328.

The previous prime is 770663671. The next prime is 770663687. The reversal of 770663681 is 186366077.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 770663681 - 2¹⁰ = 770662657 is a prime.

It is a super-2 number, since 2×770663681² = 1187845018424939522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (770663687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45461 + ... + 60066.

It is an arithmetic number, because the mean of its divisors is an integer number (98668680).

Almost surely, 2^770663681 is an apocalyptic number.

It is an amenable number.

770663681 is a deficient number, since it is larger than the sum of its proper divisors (18685759).

770663681 is a wasteful number, since it uses less digits than its factorization.

770663681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105703.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 770663681 is about 27760.8299767856. The cubic root of 770663681 is about 916.8289062626.

The spelling of 770663681 in words is "seven hundred seventy million, six hundred sixty-three thousand, six hundred eighty-one".