244667661 has 32 divisors (see below), whose sum is σ = 380620800. Its totient is φ = 136918080.

The previous prime is 244667653. The next prime is 244667669. The reversal of 244667661 is 166766442.

It is a happy number.

244667661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (244667653) and next prime (244667669).

It is not a de Polignac number, because 244667661 - 2³ = 244667653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244667669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 230071 + ... + 231131.

It is an arithmetic number, because the mean of its divisors is an integer number (11894400).

Almost surely, 2^244667661 is an apocalyptic number.

244667661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

244667661 is a deficient number, since it is larger than the sum of its proper divisors (135953139).

244667661 is a wasteful number, since it uses less digits than its factorization.

244667661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289.

The product of its digits is 290304, while the sum is 42.

The square root of 244667661 is about 15641.8560599438. The cubic root of 244667661 is about 625.4494141523.

It can be divided in two parts, 2446 and 67661, that added together give a palindrome (70107).

The spelling of 244667661 in words is "two hundred forty-four million, six hundred sixty-seven thousand, six hundred sixty-one".