166507007 has 4 divisors (see below), whose sum is σ = 167121696. Its totient is φ = 165892320.

The previous prime is 166507001. The next prime is 166507031. The reversal of 166507007 is 700705661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166507007 - 2⁶ = 166506943 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 (166507001) 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 3 ways as a sum of consecutive naturals, for example, 306938 + ... + 307479.

It is an arithmetic number, because the mean of its divisors is an integer number (41780424).

Almost surely, 2^166507007 is an apocalyptic number.

166507007 is a deficient number, since it is larger than the sum of its proper divisors (614689).

166507007 is an equidigital number, since it uses as much as digits as its factorization.

166507007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614688.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 166507007 is about 12903.7594134423. The cubic root of 166507007 is about 550.1454238045.

The spelling of 166507007 in words is "one hundred sixty-six million, five hundred seven thousand, seven".