620601663 has 32 divisors (see below), whose sum is σ = 944128512. Its totient is φ = 358934400.

The previous prime is 620601659. The next prime is 620601673. The reversal of 620601663 is 366106026.

It is not a de Polignac number, because 620601663 - 2² = 620601659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 620601663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620601623) 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, 501081 + ... + 502317.

It is an arithmetic number, because the mean of its divisors is an integer number (29504016).

Almost surely, 2^620601663 is an apocalyptic number.

620601663 is a deficient number, since it is larger than the sum of its proper divisors (323526849).

620601663 is a wasteful number, since it uses less digits than its factorization.

620601663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1935.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 620601663 is about 24911.8779500864. The cubic root of 620601663 is about 852.9776366703.

Adding to 620601663 its reverse (366106026), we get a palindrome (986707689).

The spelling of 620601663 in words is "six hundred twenty million, six hundred one thousand, six hundred sixty-three".