620666892 has 18 divisors (see below), whose sum is σ = 1568908068. Its totient is φ = 206888952.

The previous prime is 620666873. The next prime is 620666909. The reversal of 620666892 is 298666026.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 8620338 + ... + 8620409.

Almost surely, 2^620666892 is an apocalyptic number.

It is an amenable number.

620666892 is an abundant number, since it is smaller than the sum of its proper divisors (948241176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

620666892 is a wasteful number, since it uses less digits than its factorization.

620666892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17240757 (or 17240752 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 620666892 is about 24913.1871104441. The cubic root of 620666892 is about 853.0075199983.

The spelling of 620666892 in words is "six hundred twenty million, six hundred sixty-six thousand, eight hundred ninety-two".