820661422 has 16 divisors (see below), whose sum is σ = 1408250592. Its totient is φ = 351361440.

The previous prime is 820661411. The next prime is 820661449. The reversal of 820661422 is 224166028.

820661422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14413 + ... + 43000.

It is an arithmetic number, because the mean of its divisors is an integer number (88015662).

Almost surely, 2^820661422 is an apocalyptic number.

820661422 is a deficient number, since it is larger than the sum of its proper divisors (587589170).

820661422 is a wasteful number, since it uses less digits than its factorization.

820661422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58443.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 820661422 is about 28647.1887276919. The cubic root of 820661422 is about 936.2417550401.

The spelling of 820661422 in words is "eight hundred twenty million, six hundred sixty-one thousand, four hundred twenty-two".