2500665406 has 8 divisors (see below), whose sum is σ = 3871998144. Its totient is φ = 1209999360.

The previous prime is 2500665397. The next prime is 2500665407. The reversal of 2500665406 is 6045660052.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2500665407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20166595 + ... + 20166718.

It is an arithmetic number, because the mean of its divisors is an integer number (483999768).

Almost surely, 2^2500665406 is an apocalyptic number.

2500665406 is a deficient number, since it is larger than the sum of its proper divisors (1371332738).

2500665406 is a wasteful number, since it uses less digits than its factorization.

2500665406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40333346.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 2500665406 is about 50006.6536172938. The cubic root of 2500665406 is about 1357.3292102672.

The spelling of 2500665406 in words is "two billion, five hundred million, six hundred sixty-five thousand, four hundred six".