671699952 has 400 divisors, whose sum is σ = 2488983552. Its totient is φ = 169827840.

The previous prime is 671699939. The next prime is 671700013. The reversal of 671699952 is 259996176.

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

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, 5288913 + ... + 5289039.

Almost surely, 2^671699952 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 671699952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1244491776).

671699952 is an abundant number, since it is smaller than the sum of its proper divisors (1817283600).

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

671699952 is a wasteful number, since it uses less digits than its factorization.

671699952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 203 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The square root of 671699952 is about 25917.1748460360. The cubic root of 671699952 is about 875.7734448839.

The spelling of 671699952 in words is "six hundred seventy-one million, six hundred ninety-nine thousand, nine hundred fifty-two".