1166616001 has 4 divisors (see below), whose sum is σ = 1166690992. Its totient is φ = 1166541012.

The previous prime is 1166615977. The next prime is 1166616029. The reversal of 1166616001 is 1006166611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1166616001 - 2⁷ = 1166615873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1166616071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4455 + ... + 48508.

It is an arithmetic number, because the mean of its divisors is an integer number (291672748).

Almost surely, 2^1166616001 is an apocalyptic number.

It is an amenable number.

1166616001 is a deficient number, since it is larger than the sum of its proper divisors (74991).

1166616001 is an equidigital number, since it uses as much as digits as its factorization.

1166616001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74990.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1166616001 is about 34155.7608757293. The cubic root of 1166616001 is about 1052.7113602188.

It can be divided in two parts, 116661600 and 1, that added together give a square (116661601 = 10801²).

The spelling of 1166616001 in words is "one billion, one hundred sixty-six million, six hundred sixteen thousand, one".