665122072 has 16 divisors (see below), whose sum is σ = 1250809560. Its totient is φ = 331572864.

The previous prime is 665122063. The next prime is 665122079. The reversal of 665122072 is 270221566.

665122072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665122079) 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, 120658 + ... + 126049.

Almost surely, 2^665122072 is an apocalyptic number.

It is an amenable number.

665122072 is a deficient number, since it is larger than the sum of its proper divisors (585687488).

665122072 is a wasteful number, since it uses less digits than its factorization.

665122072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247050 (or 247046 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 665122072 is about 25789.9606824051. The cubic root of 665122072 is about 872.9052791601.

The spelling of 665122072 in words is "six hundred sixty-five million, one hundred twenty-two thousand, seventy-two".