366621 has 4 divisors (see below), whose sum is σ = 488832. Its totient is φ = 244412.

The previous prime is 366607. The next prime is 366631. The reversal of 366621 is 126663.

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, and also an emirpimes, since its reverse is a distinct semiprime: 126663 = 3 ⋅42221.

It is a cyclic number.

It is not a de Polignac number, because 366621 - 2¹³ = 358429 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 366591 and 366600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (366631) 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, 61101 + ... + 61106.

It is an arithmetic number, because the mean of its divisors is an integer number (122208).

2³⁶⁶⁶²¹ is an apocalyptic number.

It is an amenable number.

366621 is a deficient number, since it is larger than the sum of its proper divisors (122211).

366621 is a wasteful number, since it uses less digits than its factorization.

366621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122210.

The product of its digits is 1296, while the sum is 24.

The square root of 366621 is about 605.4923616364. The cubic root of 366621 is about 71.5713340925.

It can be divided in two parts, 36662 and 1, that added together give a palindrome (36663).

The spelling of 366621 in words is "three hundred sixty-six thousand, six hundred twenty-one".