1166642039 has 4 divisors (see below), whose sum is σ = 1167196800. Its totient is φ = 1166087280.

The previous prime is 1166642027. The next prime is 1166642053. The reversal of 1166642039 is 9302466611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1166642039 - 2¹⁶ = 1166576503 is a prime.

It is a super-2 number, since 2×1166642039² = 2722107294324155042, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1166641993 and 1166642011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166642339) 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, 274214 + ... + 278435.

It is an arithmetic number, because the mean of its divisors is an integer number (291799200).

Almost surely, 2^1166642039 is an apocalyptic number.

1166642039 is a deficient number, since it is larger than the sum of its proper divisors (554761).

1166642039 is an equidigital number, since it uses as much as digits as its factorization.

1166642039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554760.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 1166642039 is about 34156.1420391706. The cubic root of 1166642039 is about 1052.7191920716.

The spelling of 1166642039 in words is "one billion, one hundred sixty-six million, six hundred forty-two thousand, thirty-nine".