1170066721 has 16 divisors (see below), whose sum is σ = 1252532160. Its totient is φ = 1089849600.

The previous prime is 1170066659. The next prime is 1170066727. The reversal of 1170066721 is 1276600711.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1170066721 is a prime.

It is a super-2 number, since 2×1170066721² = 2738112263183383682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1170066727) 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, 276421 + ... + 280621.

It is an arithmetic number, because the mean of its divisors is an integer number (78283260).

Almost surely, 2^1170066721 is an apocalyptic number.

It is an amenable number.

1170066721 is a deficient number, since it is larger than the sum of its proper divisors (82465439).

1170066721 is a wasteful number, since it uses less digits than its factorization.

1170066721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4464.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 1170066721 is about 34206.2380422051. The cubic root of 1170066721 is about 1053.7482727919.

The spelling of 1170066721 in words is "one billion, one hundred seventy million, sixty-six thousand, seven hundred twenty-one".