620555697 has 12 divisors (see below), whose sum is σ = 896930320. Its totient is φ = 413439768.

The previous prime is 620555681. The next prime is 620555707. The reversal of 620555697 is 796555026.

620555697 is a `hidden beast` number, since 6 + 2 + 0 + 5 + 556 + 97 = 666.

It is not a de Polignac number, because 620555697 - 2⁴ = 620555681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620555197) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6547 + ... + 35832.

Almost surely, 2^620555697 is an apocalyptic number.

It is an amenable number.

620555697 is a deficient number, since it is larger than the sum of its proper divisors (276374623).

620555697 is a wasteful number, since it uses less digits than its factorization.

620555697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44012 (or 44009 counting only the distinct ones).

The product of its (nonzero) digits is 567000, while the sum is 45.

The square root of 620555697 is about 24910.9553610455. The cubic root of 620555697 is about 852.9565770329.

The spelling of 620555697 in words is "six hundred twenty million, five hundred fifty-five thousand, six hundred ninety-seven".