6420266026 has 4 divisors (see below), whose sum is σ = 9630399042. Its totient is φ = 3210133012.

The previous prime is 6420266009. The next prime is 6420266029. The reversal of 6420266026 is 6206620246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6206620246 = 2 ⋅3103310123.

It can be written as a sum of positive squares in only one way, i.e., 6233260401 + 187005625 = 78951^2 + 13675^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6420265982 and 6420266000.

It is not an unprimeable number, because it can be changed into a prime (6420266029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1605066505 + ... + 1605066508.

Almost surely, 2^6420266026 is an apocalyptic number.

6420266026 is a deficient number, since it is larger than the sum of its proper divisors (3210133016).

6420266026 is a wasteful number, since it uses less digits than its factorization.

6420266026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210133015.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 6420266026 is about 80126.5625495066. The cubic root of 6420266026 is about 1858.5931885481.

The spelling of 6420266026 in words is "six billion, four hundred twenty million, two hundred sixty-six thousand, twenty-six".