6420266434 has 4 divisors (see below), whose sum is σ = 9630399654. Its totient is φ = 3210133216.

The previous prime is 6420266431. The next prime is 6420266453. The reversal of 6420266434 is 4346620246.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5693155209 + 727111225 = 75453^2 + 26965^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6420266393 and 6420266402.

It is not an unprimeable number, because it can be changed into a prime (6420266431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1605066607 + ... + 1605066610.

Almost surely, 2^6420266434 is an apocalyptic number.

6420266434 is a deficient number, since it is larger than the sum of its proper divisors (3210133220).

6420266434 is a wasteful number, since it uses less digits than its factorization.

6420266434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3210133219.

The product of its (nonzero) digits is 165888, while the sum is 37.

The square root of 6420266434 is about 80126.5650954788. The cubic root of 6420266434 is about 1858.5932279186.

The spelling of 6420266434 in words is "six billion, four hundred twenty million, two hundred sixty-six thousand, four hundred thirty-four".