671628996 has 60 divisors (see below), whose sum is σ = 1859066748. Its totient is φ = 210705408.

The previous prime is 671628989. The next prime is 671629019. The reversal of 671628996 is 699826176.

671628996 is a `hidden beast` number, since 6 + 7 + 1 + 628 + 9 + 9 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 298598400 + 373030596 = 17280^2 + 19314^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 55461 + ... + 66476.

Almost surely, 2^671628996 is an apocalyptic number.

It is an amenable number.

671628996 is an abundant number, since it is smaller than the sum of its proper divisors (1187437752).

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

671628996 is a wasteful number, since it uses less digits than its factorization.

671628996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121970 (or 121959 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 671628996 is about 25915.8059106793. The cubic root of 671628996 is about 875.7426059314.

The spelling of 671628996 in words is "six hundred seventy-one million, six hundred twenty-eight thousand, nine hundred ninety-six".