1161666570 has 32 divisors (see below), whose sum is σ = 2847322368. Its totient is φ = 303186368.

The previous prime is 1161666557. The next prime is 1161666577. The reversal of 1161666570 is 756661611.

It is not an unprimeable number, because it can be changed into a prime (1161666577) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 410529 + ... + 413348.

It is an arithmetic number, because the mean of its divisors is an integer number (88978824).

Almost surely, 2^1161666570 is an apocalyptic number.

1161666570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1161666570 is an abundant number, since it is smaller than the sum of its proper divisors (1685655798).

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

1161666570 is a wasteful number, since it uses less digits than its factorization.

1161666570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823934.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 1161666570 is about 34083.2300405933. The cubic root of 1161666570 is about 1051.2205217568.

The spelling of 1161666570 in words is "one billion, one hundred sixty-one million, six hundred sixty-six thousand, five hundred seventy".