4006657 has 8 divisors (see below), whose sum is σ = 4159232. Its totient is φ = 3855600.

The previous prime is 4006649. The next prime is 4006661. The reversal of 4006657 is 7566004.

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

It is a cyclic number.

It is not a de Polignac number, because 4006657 - 2³ = 4006649 is a prime.

It is a Duffinian number.

4006657 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4006637) 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, 9307 + ... + 9727.

It is an arithmetic number, because the mean of its divisors is an integer number (519904).

Almost surely, 2^4006657 is an apocalyptic number.

It is an amenable number.

4006657 is a deficient number, since it is larger than the sum of its proper divisors (152575).

4006657 is a wasteful number, since it uses less digits than its factorization.

4006657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 4006657 is about 2001.6635581436. The cubic root of 4006657 is about 158.8281174634.

The spelling of 4006657 in words is "four million, six thousand, six hundred fifty-seven".