6402660553 has 4 divisors (see below), whose sum is σ = 6436182528. Its totient is φ = 6369138580.

The previous prime is 6402660533. The next prime is 6402660577. The reversal of 6402660553 is 3550662046.

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.

It is a cyclic number.

It is not a de Polignac number, because 6402660553 - 2⁵ = 6402660521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6402660533) 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 3 ways as a sum of consecutive naturals, for example, 16760701 + ... + 16761082.

It is an arithmetic number, because the mean of its divisors is an integer number (1609045632).

Almost surely, 2^6402660553 is an apocalyptic number.

It is an amenable number.

6402660553 is a deficient number, since it is larger than the sum of its proper divisors (33521975).

6402660553 is a wasteful number, since it uses less digits than its factorization.

6402660553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33521974.

The product of its (nonzero) digits is 129600, while the sum is 37.

The square root of 6402660553 is about 80016.6267284494. The cubic root of 6402660553 is about 1856.8927726588.

The spelling of 6402660553 in words is "six billion, four hundred two million, six hundred sixty thousand, five hundred fifty-three".