3716668521 has 6 divisors (see below), whose sum is σ = 5368521210. Its totient is φ = 2477779008.

The previous prime is 3716668519. The next prime is 3716668547. The reversal of 3716668521 is 1258666173.

It can be written as a sum of positive squares in only one way, i.e., 3559792896 + 156875625 = 59664^2 + 12525^2 .

It is not a de Polignac number, because 3716668521 - 2¹ = 3716668519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3716668561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 206481576 + ... + 206481593.

It is an arithmetic number, because the mean of its divisors is an integer number (894753535).

Almost surely, 2^3716668521 is an apocalyptic number.

It is an amenable number.

3716668521 is a deficient number, since it is larger than the sum of its proper divisors (1651852689).

3716668521 is a wasteful number, since it uses less digits than its factorization.

3716668521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412963175 (or 412963172 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 3716668521 is about 60964.4857355493. The cubic root of 3716668521 is about 1548.9994959852. Note that the first 3 decimals are identical.

The spelling of 3716668521 in words is "three billion, seven hundred sixteen million, six hundred sixty-eight thousand, five hundred twenty-one".