6657429 has 8 divisors (see below), whose sum is σ = 9343840. Its totient is φ = 4204656.

The previous prime is 6657407. The next prime is 6657437. The reversal of 6657429 is 9247566.

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

It is not a de Polignac number, because 6657429 - 2⁹ = 6656917 is a prime.

It is a Duffinian number.

6657429 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6657449) 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, 58342 + ... + 58455.

It is an arithmetic number, because the mean of its divisors is an integer number (1167980).

Almost surely, 2^6657429 is an apocalyptic number.

It is an amenable number.

6657429 is a deficient number, since it is larger than the sum of its proper divisors (2686411).

6657429 is a wasteful number, since it uses less digits than its factorization.

6657429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116819.

The product of its digits is 90720, while the sum is 39.

The square root of 6657429 is about 2580.1994108983. The cubic root of 6657429 is about 188.1202358223.

The spelling of 6657429 in words is "six million, six hundred fifty-seven thousand, four hundred twenty-nine".