1165660211570 has 16 divisors (see below), whose sum is σ = 2098200730968. Its totient is φ = 466261340160.

The previous prime is 1165660211567. The next prime is 1165660211593. The reversal of 1165660211570 is 751120665611.

It can be written as a sum of positive squares in 4 ways, for example, as 1024206744961 + 141453466609 = 1012031^2 + 376103^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2907122 + ... + 3283698.

Almost surely, 2^{1165660211570} is an apocalyptic number.

1165660211570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1165660211570 is a deficient number, since it is larger than the sum of its proper divisors (932540519398).

1165660211570 is a wasteful number, since it uses less digits than its factorization.

1165660211570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686125.

The product of its (nonzero) digits is 75600, while the sum is 41.

The spelling of 1165660211570 in words is "one trillion, one hundred sixty-five billion, six hundred sixty million, two hundred eleven thousand, five hundred seventy".