667072755 has 12 divisors (see below), whose sum is σ = 1156259520. Its totient is φ = 355772112.

The previous prime is 667072753. The next prime is 667072789. The reversal of 667072755 is 557270766.

It is not a de Polignac number, because 667072755 - 2¹ = 667072753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 14823839 = 667072755 / (6 + 6 + 7 + 0 + 7 + 2 + 7 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 667072755.

It is not an unprimeable number, because it can be changed into a prime (667072753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7411875 + ... + 7411964.

It is an arithmetic number, because the mean of its divisors is an integer number (96354960).

Almost surely, 2^667072755 is an apocalyptic number.

667072755 is a deficient number, since it is larger than the sum of its proper divisors (489186765).

667072755 is a wasteful number, since it uses less digits than its factorization.

667072755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14823850 (or 14823847 counting only the distinct ones).

The product of its (nonzero) digits is 617400, while the sum is 45.

The square root of 667072755 is about 25827.7516443069. The cubic root of 667072755 is about 873.7578041509.

The spelling of 667072755 in words is "six hundred sixty-seven million, seventy-two thousand, seven hundred fifty-five".