3840666537 has 32 divisors (see below), whose sum is σ = 5524070400. Its totient is φ = 2364670208.

The previous prime is 3840666497. The next prime is 3840666551. The reversal of 3840666537 is 7356660483.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3840666537 - 2¹⁰ = 3840665513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3840656537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2668264 + ... + 2669702.

It is an arithmetic number, because the mean of its divisors is an integer number (172627200).

Almost surely, 2^3840666537 is an apocalyptic number.

It is an amenable number.

3840666537 is a deficient number, since it is larger than the sum of its proper divisors (1683403863).

3840666537 is a wasteful number, since it uses less digits than its factorization.

3840666537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2405.

The product of its (nonzero) digits is 2177280, while the sum is 48.

The square root of 3840666537 is about 61973.1114032529. Note that the first 3 decimals coincide. The cubic root of 3840666537 is about 1566.0376555359.

The spelling of 3840666537 in words is "three billion, eight hundred forty million, six hundred sixty-six thousand, five hundred thirty-seven".