6642534471 has 8 divisors (see below), whose sum is σ = 8867026560. Its totient is φ = 4423199352.

The previous prime is 6642534443. The next prime is 6642534473. The reversal of 6642534471 is 1744352466.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6642534471 - 2¹¹ = 6642532423 is a prime.

It is a super-3 number, since 3×6642534471³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642534473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1286235 + ... + 1291388.

It is an arithmetic number, because the mean of its divisors is an integer number (1108378320).

Almost surely, 2^6642534471 is an apocalyptic number.

6642534471 is a deficient number, since it is larger than the sum of its proper divisors (2224492089).

6642534471 is a wasteful number, since it uses less digits than its factorization.

6642534471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578485.

The product of its digits is 483840, while the sum is 42.

The square root of 6642534471 is about 81501.7452021734. The cubic root of 6642534471 is about 1879.7983855583.

The spelling of 6642534471 in words is "six billion, six hundred forty-two million, five hundred thirty-four thousand, four hundred seventy-one".