251680006 has 8 divisors (see below), whose sum is σ = 383154840. Its totient is φ = 123961728.

The previous prime is 251680003. The next prime is 251680021. The reversal of 251680006 is 600086152.

251680006 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 (251680003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 938971 + ... + 939238.

It is an arithmetic number, because the mean of its divisors is an integer number (47894355).

Almost surely, 2^251680006 is an apocalyptic number.

251680006 is a deficient number, since it is larger than the sum of its proper divisors (131474834).

251680006 is a wasteful number, since it uses less digits than its factorization.

251680006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878278.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 251680006 is about 15864.4258011439. The cubic root of 251680006 is about 631.3684923987.

The spelling of 251680006 in words is "two hundred fifty-one million, six hundred eighty thousand, six".