244525006661 has 4 divisors (see below), whose sum is σ = 263334622572. Its totient is φ = 225715390752.

The previous prime is 244525006643. The next prime is 244525006711. The reversal of 244525006661 is 166600525442.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53386413025 + 191138593636 = 231055^2 + 437194^2 .

It is a cyclic number.

It is not a de Polignac number, because 244525006661 - 2⁶ = 244525006597 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 (244525006961) 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, 9404807936 + ... + 9404807961.

It is an arithmetic number, because the mean of its divisors is an integer number (65833655643).

Almost surely, 2^244525006661 is an apocalyptic number.

It is an amenable number.

244525006661 is a deficient number, since it is larger than the sum of its proper divisors (18809615911).

244525006661 is a wasteful number, since it uses less digits than its factorization.

244525006661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18809615910.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 244525006661 in words is "two hundred forty-four billion, five hundred twenty-five million, six thousand, six hundred sixty-one".