166261207 has 8 divisors (see below), whose sum is σ = 201190176. Its totient is φ = 134126592.

The previous prime is 166261171. The next prime is 166261211. The reversal of 166261207 is 702162661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166261207 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 (166261247) 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 7 ways as a sum of consecutive naturals, for example, 698458 + ... + 698695.

It is an arithmetic number, because the mean of its divisors is an integer number (25148772).

Almost surely, 2^166261207 is an apocalyptic number.

166261207 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

166261207 is a deficient number, since it is larger than the sum of its proper divisors (34928969).

166261207 is a wasteful number, since it uses less digits than its factorization.

166261207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397177.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 166261207 is about 12894.2315397235. The cubic root of 166261207 is about 549.8745796662.

The spelling of 166261207 in words is "one hundred sixty-six million, two hundred sixty-one thousand, two hundred seven".