3662546721 has 4 divisors (see below), whose sum is σ = 4883395632. Its totient is φ = 2441697812.

The previous prime is 3662546669. The next prime is 3662546731. The reversal of 3662546721 is 1276452663.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3662546721 - 2¹⁹ = 3662022433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3662546731) 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, 610424451 + ... + 610424456.

It is an arithmetic number, because the mean of its divisors is an integer number (1220848908).

Almost surely, 2^3662546721 is an apocalyptic number.

It is an amenable number.

3662546721 is a deficient number, since it is larger than the sum of its proper divisors (1220848911).

3662546721 is a wasteful number, since it uses less digits than its factorization.

3662546721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220848910.

The product of its digits is 362880, while the sum is 42.

The square root of 3662546721 is about 60518.9781886641. The cubic root of 3662546721 is about 1541.4439036862.

The spelling of 3662546721 in words is "three billion, six hundred sixty-two million, five hundred forty-six thousand, seven hundred twenty-one".