676991520 has 120 divisors (see below), whose sum is σ = 2389261644. Its totient is φ = 180527616.

The previous prime is 676991507. The next prime is 676991521. The reversal of 676991520 is 25199676.

It is a happy number.

676991520 is a `hidden beast` number, since 67 + 69 + 9 + 1 + 520 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 666259344 + 10732176 = 25812^2 + 3276^2 .

It is a tau number, because it is divible by the number of its divisors (120).

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

It is not an unprimeable number, because it can be changed into a prime (676991521) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13159 + ... + 39078.

Almost surely, 2^676991520 is an apocalyptic number.

676991520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

676991520 is an abundant number, since it is smaller than the sum of its proper divisors (1712270124).

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

676991520 is a wasteful number, since it uses less digits than its factorization.

676991520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52264 (or 52247 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 676991520 is about 26019.0607055674. The cubic root of 676991520 is about 878.0671766064.

It can be divided in two parts, 6769 and 91520, that added together give a palindrome (98289).

The spelling of 676991520 in words is "six hundred seventy-six million, nine hundred ninety-one thousand, five hundred twenty".