671621010 has 32 divisors (see below), whose sum is σ = 1616308992. Its totient is φ = 178608000.

The previous prime is 671620997. The next prime is 671621011. The reversal of 671621010 is 10126176.

It is not an unprimeable number, because it can be changed into a prime (671621011) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 19491 + ... + 41510.

It is an arithmetic number, because the mean of its divisors is an integer number (50509656).

Almost surely, 2^671621010 is an apocalyptic number.

671621010 is an abundant number, since it is smaller than the sum of its proper divisors (944687982).

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

671621010 is a wasteful number, since it uses less digits than its factorization.

671621010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61378.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 671621010 is about 25915.6518343645. The cubic root of 671621010 is about 875.7391349138.

Adding to 671621010 its reverse (10126176), we get a palindrome (681747186).

The spelling of 671621010 in words is "six hundred seventy-one million, six hundred twenty-one thousand, ten".