6420996629 has 16 divisors (see below), whose sum is σ = 6921794880. Its totient is φ = 5936716800.

The previous prime is 6420996623. The next prime is 6420996649. The reversal of 6420996629 is 9266990246.

It is a cyclic number.

It is not a de Polignac number, because 6420996629 - 2¹² = 6420992533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420996623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1335029 + ... + 1339829.

It is an arithmetic number, because the mean of its divisors is an integer number (432612180).

Almost surely, 2^6420996629 is an apocalyptic number.

It is an amenable number.

6420996629 is a deficient number, since it is larger than the sum of its proper divisors (500798251).

6420996629 is a wasteful number, since it uses less digits than its factorization.

6420996629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6500.

The product of its (nonzero) digits is 2519424, while the sum is 53.

The square root of 6420996629 is about 80131.1214759908. The cubic root of 6420996629 is about 1858.6636862632.

The spelling of 6420996629 in words is "six billion, four hundred twenty million, nine hundred ninety-six thousand, six hundred twenty-nine".