400666325 has 12 divisors (see below), whose sum is σ = 518428128. Its totient is φ = 306596400.

The previous prime is 400666307. The next prime is 400666327. The reversal of 400666325 is 523666004.

It is not a de Polignac number, because 400666325 - 2¹⁰ = 400665301 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400666291 and 400666300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400666327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 347831 + ... + 348980.

It is an arithmetic number, because the mean of its divisors is an integer number (43202344).

Almost surely, 2^400666325 is an apocalyptic number.

It is an amenable number.

400666325 is a deficient number, since it is larger than the sum of its proper divisors (117761803).

400666325 is a wasteful number, since it uses less digits than its factorization.

400666325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696844 (or 696839 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 400666325 is about 20016.6511934439. The cubic root of 400666325 is about 737.2151998098.

The spelling of 400666325 in words is "four hundred million, six hundred sixty-six thousand, three hundred twenty-five".