6745557 has 16 divisors (see below), whose sum is σ = 11070080. Its totient is φ = 3557952.

The previous prime is 6745553. The next prime is 6745559. The reversal of 6745557 is 7555476.

It is not a de Polignac number, because 6745557 - 2² = 6745553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

6745557 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6745553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12082 + ... + 12627.

It is an arithmetic number, because the mean of its divisors is an integer number (691880).

Almost surely, 2^6745557 is an apocalyptic number.

It is an amenable number.

6745557 is a deficient number, since it is larger than the sum of its proper divisors (4324523).

6745557 is a wasteful number, since it uses less digits than its factorization.

6745557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24732.

The product of its digits is 147000, while the sum is 39.

The square root of 6745557 is about 2597.2210148541. The cubic root of 6745557 is about 188.9466829814.

The spelling of 6745557 in words is "six million, seven hundred forty-five thousand, five hundred fifty-seven".