671650 has 48 divisors (see below), whose sum is σ = 1517760. Its totient is φ = 216000.

The previous prime is 671647. The next prime is 671651. The reversal of 671650 is 56176.

It is a super-2 number, since 2×671650² = 902227445000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671651) 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 23 ways as a sum of consecutive naturals, for example, 6600 + ... + 6700.

It is an arithmetic number, because the mean of its divisors is an integer number (31620).

2⁶⁷¹⁶⁵⁰ is an apocalyptic number.

671650 is an abundant number, since it is smaller than the sum of its proper divisors (846110).

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

671650 is a wasteful number, since it uses less digits than its factorization.

671650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 671650 is about 819.5425553319. The cubic root of 671650 is about 87.5751734933.

The spelling of 671650 in words is "six hundred seventy-one thousand, six hundred fifty".