620666361 has 32 divisors (see below), whose sum is σ = 1061099520. Its totient is φ = 351212112.

The previous prime is 620666353. The next prime is 620666377. The reversal of 620666361 is 163666026.

It is not a de Polignac number, because 620666361 - 2³ = 620666353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (620666461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3526 + ... + 35408.

It is an arithmetic number, because the mean of its divisors is an integer number (33159360).

Almost surely, 2^620666361 is an apocalyptic number.

It is an amenable number.

620666361 is a deficient number, since it is larger than the sum of its proper divisors (440433159).

620666361 is a wasteful number, since it uses less digits than its factorization.

620666361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32002 (or 31996 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 620666361 is about 24913.1764534352. The cubic root of 620666361 is about 853.0072767400.

The spelling of 620666361 in words is "six hundred twenty million, six hundred sixty-six thousand, three hundred sixty-one".