166520107 has 8 divisors (see below), whose sum is σ = 183145536. Its totient is φ = 150439872.

The previous prime is 166520099. The next prime is 166520111. The reversal of 166520107 is 701025661.

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

It is a cyclic number.

It is not a de Polignac number, because 166520107 - 2³ = 166520099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166520507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135658 + ... + 136879.

It is an arithmetic number, because the mean of its divisors is an integer number (22893192).

Almost surely, 2^166520107 is an apocalyptic number.

166520107 is a deficient number, since it is larger than the sum of its proper divisors (16625429).

166520107 is a wasteful number, since it uses less digits than its factorization.

166520107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272597.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 166520107 is about 12904.2670074669. The cubic root of 166520107 is about 550.1598510573.

Adding to 166520107 its reverse (701025661), we get a palindrome (867545768).

The spelling of 166520107 in words is "one hundred sixty-six million, five hundred twenty thousand, one hundred seven".