367221661 has 4 divisors (see below), whose sum is σ = 368331424. Its totient is φ = 366111900.

The previous prime is 367221653. The next prime is 367221667. The reversal of 367221661 is 166122763.

It is a happy number.

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 367221661 - 2³ = 367221653 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 (367221667) 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, 554385 + ... + 555046.

It is an arithmetic number, because the mean of its divisors is an integer number (92082856).

Almost surely, 2^367221661 is an apocalyptic number.

It is an amenable number.

367221661 is a deficient number, since it is larger than the sum of its proper divisors (1109763).

367221661 is a wasteful number, since it uses less digits than its factorization.

367221661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109762.

The product of its digits is 18144, while the sum is 34.

The square root of 367221661 is about 19163.0284923861. The cubic root of 367221661 is about 716.1039955110.

It can be divided in two parts, 36722 and 1661, that added together give a palindrome (38383).

The spelling of 367221661 in words is "three hundred sixty-seven million, two hundred twenty-one thousand, six hundred sixty-one".