6657601 has 4 divisors (see below), whose sum is σ = 6766804. Its totient is φ = 6548400.

The previous prime is 6657593. The next prime is 6657613. The reversal of 6657601 is 1067566.

6657601 = 1824² + 1825².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3326976 + 3330625 = 1824^2 + 1825^2 .

It is a cyclic number.

It is not a de Polignac number, because 6657601 - 2³ = 6657593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6657631) 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, 54510 + ... + 54631.

It is an arithmetic number, because the mean of its divisors is an integer number (1691701).

Almost surely, 2^6657601 is an apocalyptic number.

6657601 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

6657601 is the 1825-th centered square number.

It is an amenable number.

6657601 is a deficient number, since it is larger than the sum of its proper divisors (109203).

6657601 is a wasteful number, since it uses less digits than its factorization.

6657601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109202.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 6657601 is about 2580.2327414402. The cubic root of 6657601 is about 188.1218558872.

The spelling of 6657601 in words is "six million, six hundred fifty-seven thousand, six hundred one".