1664701176157 has 4 divisors (see below), whose sum is σ = 1722104665020. Its totient is φ = 1607297687296.

The previous prime is 1664701176031. The next prime is 1664701176263. The reversal of 1664701176157 is 7516711074661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 908855248921 + 755845927236 = 953339^2 + 869394^2 .

It is a cyclic number.

It is not a de Polignac number, because 1664701176157 - 2¹⁵ = 1664701143389 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 (1664701116157) 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, 28701744388 + ... + 28701744445.

It is an arithmetic number, because the mean of its divisors is an integer number (430526166255).

Almost surely, 2^{1664701176157} is an apocalyptic number.

It is an amenable number.

1664701176157 is a deficient number, since it is larger than the sum of its proper divisors (57403488863).

1664701176157 is an equidigital number, since it uses as much as digits as its factorization.

1664701176157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57403488862.

The product of its (nonzero) digits is 1481760, while the sum is 52.

The spelling of 1664701176157 in words is "one trillion, six hundred sixty-four billion, seven hundred one million, one hundred seventy-six thousand, one hundred fifty-seven".