620664404042 has 8 divisors (see below), whose sum is σ = 985761112356. Its totient is φ = 292077366592.

The previous prime is 620664404023. The next prime is 620664404053. The reversal of 620664404042 is 240404466026.

It can be written as a sum of positive squares in 2 ways, for example, as 620031831241 + 632572801 = 787421^2 + 25151^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×620664404042² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 620664403987 and 620664404005.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9127417673 + ... + 9127417740.

Almost surely, 2^620664404042 is an apocalyptic number.

620664404042 is a deficient number, since it is larger than the sum of its proper divisors (365096708314).

620664404042 is a wasteful number, since it uses less digits than its factorization.

620664404042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18254835432.

The product of its (nonzero) digits is 221184, while the sum is 38.

The spelling of 620664404042 in words is "six hundred twenty billion, six hundred sixty-four million, four hundred four thousand, forty-two".