770663808 has 128 divisors (see below), whose sum is σ = 2303445600. Its totient is φ = 256794624.

The previous prime is 770663801. The next prime is 770663827. The reversal of 770663808 is 808366077.

770663808 is a `hidden beast` number, since 7 + 7 + 0 + 6 + 638 + 0 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×770663808² = 1187845409922121728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (770663801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 278560 + ... + 281312.

Almost surely, 2^770663808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 770663808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1151722800).

770663808 is an abundant number, since it is smaller than the sum of its proper divisors (1532781792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

770663808 is an frugal number, since it uses more digits than its factorization.

770663808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2788 (or 2758 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 770663808 is about 27760.8322641811. The cubic root of 770663808 is about 916.8289566250.

The spelling of 770663808 in words is "seven hundred seventy million, six hundred sixty-three thousand, eight hundred eight".