666075572 has 24 divisors (see below), whose sum is σ = 1235311560. Its totient is φ = 313164800.

The previous prime is 666075499. The next prime is 666075661. The reversal of 666075572 is 275570666.

666075572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4351396 + 661724176 = 2086^2 + 25724^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84704 + ... + 92232.

It is an arithmetic number, because the mean of its divisors is an integer number (51471315).

Almost surely, 2^666075572 is an apocalyptic number.

It is an amenable number.

666075572 is a deficient number, since it is larger than the sum of its proper divisors (569235988).

666075572 is a wasteful number, since it uses less digits than its factorization.

666075572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8851 (or 8849 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 44.

The square root of 666075572 is about 25808.4399373538. The cubic root of 666075572 is about 873.3222040162.

The spelling of 666075572 in words is "six hundred sixty-six million, seventy-five thousand, five hundred seventy-two".