3721662999 has 6 divisors (see below), whose sum is σ = 5375735456. Its totient is φ = 2481108660.

The previous prime is 3721662983. The next prime is 3721663007. The reversal of 3721662999 is 9992661273.

3721662999 is a `hidden beast` number, since 3 + 7 + 2 + 1 + 6 + 629 + 9 + 9 = 666.

3721662999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3721662999 - 2⁴ = 3721662983 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 (3721662949) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 206759047 + ... + 206759064.

Almost surely, 2^3721662999 is an apocalyptic number.

3721662999 is a deficient number, since it is larger than the sum of its proper divisors (1654072457).

3721662999 is a wasteful number, since it uses less digits than its factorization.

3721662999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413518117 (or 413518114 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The square root of 3721662999 is about 61005.4341759814. The cubic root of 3721662999 is about 1549.6930365419.

The spelling of 3721662999 in words is "three billion, seven hundred twenty-one million, six hundred sixty-two thousand, nine hundred ninety-nine".