165670612787 has 2 divisors, whose sum is σ = 165670612788. Its totient is φ = 165670612786.

The previous prime is 165670612763. The next prime is 165670612813. The reversal of 165670612787 is 787216076561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165670612787 - 2³² = 161375645491 is a prime.

It is not a weakly prime, because it can be changed into another prime (165670612747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82835306393 + 82835306394.

It is an arithmetic number, because the mean of its divisors is an integer number (82835306394).

Almost surely, 2^165670612787 is an apocalyptic number.

165670612787 is a deficient number, since it is larger than the sum of its proper divisors (1).

165670612787 is an equidigital number, since it uses as much as digits as its factorization.

165670612787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5927040, while the sum is 56.

The spelling of 165670612787 in words is "one hundred sixty-five billion, six hundred seventy million, six hundred twelve thousand, seven hundred eighty-seven".