6402668669 has 4 divisors (see below), whose sum is σ = 6609206400. Its totient is φ = 6196130940.

The previous prime is 6402668617. The next prime is 6402668687. The reversal of 6402668669 is 9668662046.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9668662046 = 2 ⋅4834331023.

It is a cyclic number.

It is not a de Polignac number, because 6402668669 - 2⁸ = 6402668413 is a prime.

It is a super-2 number, since 2×6402668669² = 81988332169988463122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6402668669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402668269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103268819 + ... + 103268880.

It is an arithmetic number, because the mean of its divisors is an integer number (1652301600).

Almost surely, 2^6402668669 is an apocalyptic number.

It is an amenable number.

6402668669 is a deficient number, since it is larger than the sum of its proper divisors (206537731).

6402668669 is a wasteful number, since it uses less digits than its factorization.

6402668669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206537730.

The product of its (nonzero) digits is 4478976, while the sum is 53.

The square root of 6402668669 is about 80016.6774428931. The cubic root of 6402668669 is about 1856.8935572564.

The spelling of 6402668669 in words is "six billion, four hundred two million, six hundred sixty-eight thousand, six hundred sixty-nine".