166487007 has 4 divisors (see below), whose sum is σ = 221982680. Its totient is φ = 110991336.

The previous prime is 166486997. The next prime is 166487029. The reversal of 166487007 is 700784661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 700784661 = 3 ⋅233594887.

It is not a de Polignac number, because 166487007 - 2¹⁶ = 166421471 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 (166487807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27747832 + ... + 27747837.

It is an arithmetic number, because the mean of its divisors is an integer number (55495670).

Almost surely, 2^166487007 is an apocalyptic number.

166487007 is a deficient number, since it is larger than the sum of its proper divisors (55495673).

166487007 is an equidigital number, since it uses as much as digits as its factorization.

166487007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55495672.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 166487007 is about 12902.9844222180. The cubic root of 166487007 is about 550.1233960047.

The spelling of 166487007 in words is "one hundred sixty-six million, four hundred eighty-seven thousand, seven".