223667661 has 8 divisors (see below), whose sum is σ = 340826944. Its totient is φ = 127810080.

The previous prime is 223667621. The next prime is 223667671. The reversal of 223667661 is 166766322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 223667661 - 2¹⁹ = 223143373 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 (223667621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5325400 + ... + 5325441.

It is an arithmetic number, because the mean of its divisors is an integer number (42603368).

Almost surely, 2^223667661 is an apocalyptic number.

223667661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

223667661 is a deficient number, since it is larger than the sum of its proper divisors (117159283).

223667661 is a wasteful number, since it uses less digits than its factorization.

223667661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10650851.

The product of its digits is 108864, while the sum is 39.

The square root of 223667661 is about 14955.5227591683. The cubic root of 223667661 is about 607.0172954333.

The spelling of 223667661 in words is "two hundred twenty-three million, six hundred sixty-seven thousand, six hundred sixty-one".