620767565660 has 120 divisors (see below), whose sum is σ = 1509449499600. Its totient is φ = 213851024640.

The previous prime is 620767565591. The next prime is 620767565681. The reversal of 620767565660 is 66565767026.

It is a super-2 number, since 2×620767565660² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 620767565596 and 620767565605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5507792 + ... + 5619368.

It is an arithmetic number, because the mean of its divisors is an integer number (12578745830).

Almost surely, 2^620767565660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620767565660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (754724749800).

620767565660 is an abundant number, since it is smaller than the sum of its proper divisors (888681933940).

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

620767565660 is a wasteful number, since it uses less digits than its factorization.

620767565660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111649 (or 111614 counting only the distinct ones).

The product of its (nonzero) digits is 19051200, while the sum is 56.

The spelling of 620767565660 in words is "six hundred twenty billion, seven hundred sixty-seven million, five hundred sixty-five thousand, six hundred sixty".