671550620 has 48 divisors (see below), whose sum is σ = 1521297120. Its totient is φ = 247539456.

The previous prime is 671550601. The next prime is 671550623. The reversal of 671550620 is 26055176.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671550623) 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, 182519 + ... + 186161.

It is an arithmetic number, because the mean of its divisors is an integer number (31693690).

Almost surely, 2^671550620 is an apocalyptic number.

It is an amenable number.

671550620 is an abundant number, since it is smaller than the sum of its proper divisors (849746500).

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

671550620 is a wasteful number, since it uses less digits than its factorization.

671550620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4374 (or 4372 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 671550620 is about 25914.2937391703. The cubic root of 671550620 is about 875.7085395679.

The spelling of 671550620 in words is "six hundred seventy-one million, five hundred fifty thousand, six hundred twenty".