1663170157 has 8 divisors (see below), whose sum is σ = 1848601440. Its totient is φ = 1483444560.

The previous prime is 1663170143. The next prime is 1663170191. The reversal of 1663170157 is 7510713661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1663170157 - 2¹⁵ = 1663137389 is a prime.

It is a super-2 number, since 2×1663170157² = 5532269942270809298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663170107) 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 7 ways as a sum of consecutive naturals, for example, 1425807 + ... + 1426972.

It is an arithmetic number, because the mean of its divisors is an integer number (231075180).

Almost surely, 2^1663170157 is an apocalyptic number.

It is an amenable number.

1663170157 is a deficient number, since it is larger than the sum of its proper divisors (185431283).

1663170157 is a wasteful number, since it uses less digits than its factorization.

1663170157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2852843.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 1663170157 is about 40781.9832401515. The cubic root of 1663170157 is about 1184.8014068974.

The spelling of 1663170157 in words is "one billion, six hundred sixty-three million, one hundred seventy thousand, one hundred fifty-seven".