671408825 has 12 divisors (see below), whose sum is σ = 852854268. Its totient is φ = 524025600.

The previous prime is 671408797. The next prime is 671408831. The reversal of 671408825 is 528804176.

671408825 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 73068304 + 598340521 = 8548^2 + 24461^2 .

It is not a de Polignac number, because 671408825 - 2¹⁶ = 671343289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 326492 + ... + 328541.

It is an arithmetic number, because the mean of its divisors is an integer number (71071189).

Almost surely, 2^671408825 is an apocalyptic number.

It is an amenable number.

671408825 is a deficient number, since it is larger than the sum of its proper divisors (181445443).

671408825 is a wasteful number, since it uses less digits than its factorization.

671408825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655084 (or 655079 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 671408825 is about 25911.5577493905. The cubic root of 671408825 is about 875.6469012098.

The spelling of 671408825 in words is "six hundred seventy-one million, four hundred eight thousand, eight hundred twenty-five".