3666840263 has 4 divisors (see below), whose sum is σ = 3668106288. Its totient is φ = 3665574240.

The previous prime is 3666840241. The next prime is 3666840299. The reversal of 3666840263 is 3620486663.

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

It is a cyclic number.

It is not a de Polignac number, because 3666840263 - 2¹⁴ = 3666823879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3666840223) 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, 628658 + ... + 634463.

It is an arithmetic number, because the mean of its divisors is an integer number (917026572).

Almost surely, 2^3666840263 is an apocalyptic number.

3666840263 is a deficient number, since it is larger than the sum of its proper divisors (1266025).

3666840263 is a wasteful number, since it uses less digits than its factorization.

3666840263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266024.

The product of its (nonzero) digits is 746496, while the sum is 44.

The square root of 3666840263 is about 60554.4404895298. The cubic root of 3666840263 is about 1542.0460047352.

The spelling of 3666840263 in words is "three billion, six hundred sixty-six million, eight hundred forty thousand, two hundred sixty-three".