166240787 has 2 divisors, whose sum is σ = 166240788. Its totient is φ = 166240786.

The previous prime is 166240771. The next prime is 166240793. The reversal of 166240787 is 787042661.

It is a strong prime.

It is an emirp because it is prime and its reverse (787042661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166240787 - 2⁴ = 166240771 is a prime.

It is not a weakly prime, because it can be changed into another prime (166240187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83120393 + 83120394.

It is an arithmetic number, because the mean of its divisors is an integer number (83120394).

Almost surely, 2^166240787 is an apocalyptic number.

166240787 is a deficient number, since it is larger than the sum of its proper divisors (1).

166240787 is an equidigital number, since it uses as much as digits as its factorization.

166240787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 166240787 is about 12893.4396884617. The cubic root of 166240787 is about 549.8520671013.

The spelling of 166240787 in words is "one hundred sixty-six million, two hundred forty thousand, seven hundred eighty-seven".