776245680 has 400 divisors, whose sum is σ = 3129234240. Its totient is φ = 174680064.

The previous prime is 776245669. The next prime is 776245727. The reversal of 776245680 is 86542677.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4944162 + ... + 4944318.

Almost surely, 2^776245680 is an apocalyptic number.

776245680 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 776245680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1564617120).

776245680 is an abundant number, since it is smaller than the sum of its proper divisors (2352988560).

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

776245680 is a wasteful number, since it uses less digits than its factorization.

776245680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 776245680 is about 27861.1859044083. The cubic root of 776245680 is about 919.0371463974.

The spelling of 776245680 in words is "seven hundred seventy-six million, two hundred forty-five thousand, six hundred eighty".