1664066177 has 8 divisors (see below), whose sum is σ = 1671020736. Its totient is φ = 1657122192.

The previous prime is 1664066111. The next prime is 1664066179. The reversal of 1664066177 is 7716604661.

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 1664066177 - 2¹⁶ = 1664000641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1664066179) 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, 491663 + ... + 495035.

It is an arithmetic number, because the mean of its divisors is an integer number (208877592).

Almost surely, 2^1664066177 is an apocalyptic number.

It is an amenable number.

1664066177 is a deficient number, since it is larger than the sum of its proper divisors (6954559).

1664066177 is a wasteful number, since it uses less digits than its factorization.

1664066177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5287.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 1664066177 is about 40792.9672492698. The cubic root of 1664066177 is about 1185.0141362174.

The spelling of 1664066177 in words is "one billion, six hundred sixty-four million, sixty-six thousand, one hundred seventy-seven".