1661171310 has 48 divisors (see below), whose sum is σ = 4322358144. Its totient is φ = 442639296.

The previous prime is 1661171299. The next prime is 1661171321. The reversal of 1661171310 is 131711661.

1661171310 is a `hidden beast` number, since 16 + 611 + 7 + 1 + 31 + 0 = 666.

1661171310 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1661171299) and next prime (1661171321).

It is a super-2 number, since 2×1661171310² = 5518980242334232200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124419 + ... + 137121.

It is an arithmetic number, because the mean of its divisors is an integer number (90049128).

Almost surely, 2^1661171310 is an apocalyptic number.

1661171310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1661171310 is an abundant number, since it is smaller than the sum of its proper divisors (2661186834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1661171310 is a wasteful number, since it uses less digits than its factorization.

1661171310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14169 (or 14166 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 1661171310 is about 40757.4693767903. The cubic root of 1661171310 is about 1184.3265735195.

Adding to 1661171310 its reverse (131711661), we get a palindrome (1792882971).

The spelling of 1661171310 in words is "one billion, six hundred sixty-one million, one hundred seventy-one thousand, three hundred ten".