630661405 has 32 divisors (see below), whose sum is σ = 866246400. Its totient is φ = 436531200.

The previous prime is 630661399. The next prime is 630661417. The reversal of 630661405 is 504166036.

It is not a de Polignac number, because 630661405 - 2⁵ = 630661373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110461 + ... + 116029.

It is an arithmetic number, because the mean of its divisors is an integer number (27070200).

Almost surely, 2^630661405 is an apocalyptic number.

It is an amenable number.

630661405 is a deficient number, since it is larger than the sum of its proper divisors (235584995).

630661405 is a wasteful number, since it uses less digits than its factorization.

630661405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5685.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 630661405 is about 25112.9728427361. The cubic root of 630661405 is about 857.5617818791.

The spelling of 630661405 in words is "six hundred thirty million, six hundred sixty-one thousand, four hundred five".