1660164019 has 4 divisors (see below), whose sum is σ = 1757820744. Its totient is φ = 1562507296.

The previous prime is 1660163977. The next prime is 1660164031. The reversal of 1660164019 is 9104610661.

It is a happy number.

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 1660164019 - 2⁹ = 1660163507 is a prime.

It is a super-2 number, since 2×1660164019² = 5512289139964464722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1660164059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48828337 + ... + 48828370.

It is an arithmetic number, because the mean of its divisors is an integer number (439455186).

Almost surely, 2^1660164019 is an apocalyptic number.

1660164019 is a deficient number, since it is larger than the sum of its proper divisors (97656725).

1660164019 is an equidigital number, since it uses as much as digits as its factorization.

1660164019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97656724.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 1660164019 is about 40745.1103692210. The cubic root of 1660164019 is about 1184.0871435263.

The spelling of 1660164019 in words is "one billion, six hundred sixty million, one hundred sixty-four thousand, nineteen".