671533646 has 32 divisors (see below), whose sum is σ = 1187730432. Its totient is φ = 278739360.

The previous prime is 671533607. The next prime is 671533649. The reversal of 671533646 is 646335176.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671533649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114731 + ... + 120441.

It is an arithmetic number, because the mean of its divisors is an integer number (37116576).

Almost surely, 2^671533646 is an apocalyptic number.

671533646 is a deficient number, since it is larger than the sum of its proper divisors (516196786).

671533646 is a wasteful number, since it uses less digits than its factorization.

671533646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5984.

The product of its digits is 272160, while the sum is 41.

The square root of 671533646 is about 25913.9662344459. The cubic root of 671533646 is about 875.7011614187.

The spelling of 671533646 in words is "six hundred seventy-one million, five hundred thirty-three thousand, six hundred forty-six".