660072166 has 16 divisors (see below), whose sum is σ = 1072234800. Its totient is φ = 302944608.

The previous prime is 660072163. The next prime is 660072169. The reversal of 660072166 is 661270066.

It is an interprime number because it is at equal distance from previous prime (660072163) and next prime (660072169).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660072163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66261 + ... + 75568.

It is an arithmetic number, because the mean of its divisors is an integer number (67014675).

Almost surely, 2^660072166 is an apocalyptic number.

660072166 is a deficient number, since it is larger than the sum of its proper divisors (412162634).

660072166 is a wasteful number, since it uses less digits than its factorization.

660072166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142023.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 660072166 is about 25691.8696478088. The cubic root of 660072166 is about 870.6905012743.

The spelling of 660072166 in words is "six hundred sixty million, seventy-two thousand, one hundred sixty-six".