651665606 has 8 divisors (see below), whose sum is σ = 977648880. Its totient is φ = 325782648.

The previous prime is 651665593. The next prime is 651665611. The reversal of 651665606 is 606566156.

651665606 is digitally balanced in base 2, 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5906 + ... + 36581.

It is an arithmetic number, because the mean of its divisors is an integer number (122206110).

Almost surely, 2^651665606 is an apocalyptic number.

651665606 is a deficient number, since it is larger than the sum of its proper divisors (325983274).

651665606 is a wasteful number, since it uses less digits than its factorization.

651665606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50158.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 651665606 is about 25527.7418899518. The cubic root of 651665606 is about 866.9783783737.

The spelling of 651665606 in words is "six hundred fifty-one million, six hundred sixty-five thousand, six hundred six".