2066501657 has 8 divisors (see below), whose sum is σ = 2386975392. Its totient is φ = 1768129600.

The previous prime is 2066501629. The next prime is 2066501663. The reversal of 2066501657 is 7561056602.

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 2066501657 - 2²² = 2062307353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2066501657.

It is not an unprimeable number, because it can be changed into a prime (2066501357) 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, 5525219 + ... + 5525592.

It is an arithmetic number, because the mean of its divisors is an integer number (298371924).

Almost surely, 2^2066501657 is an apocalyptic number.

It is an amenable number.

2066501657 is a deficient number, since it is larger than the sum of its proper divisors (320473735).

2066501657 is a wasteful number, since it uses less digits than its factorization.

2066501657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11050839.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 2066501657 is about 45458.7907560243. The cubic root of 2066501657 is about 1273.7335433174.

Subtracting 2066501657 from its reverse (7561056602), we obtain a palindrome (5494554945).

The spelling of 2066501657 in words is "two billion, sixty-six million, five hundred one thousand, six hundred fifty-seven".