1166663554 has 8 divisors (see below), whose sum is σ = 1999994688. Its totient is φ = 499998660.

The previous prime is 1166663543. The next prime is 1166663609. The reversal of 1166663554 is 4553666611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1166663554² = 2722207696463821832, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1166663554.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41666542 + ... + 41666569.

It is an arithmetic number, because the mean of its divisors is an integer number (249999336).

Almost surely, 2^1166663554 is an apocalyptic number.

1166663554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1166663554 is a deficient number, since it is larger than the sum of its proper divisors (833331134).

1166663554 is an equidigital number, since it uses as much as digits as its factorization.

1166663554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83333120.

The product of its digits is 388800, while the sum is 43.

The square root of 1166663554 is about 34156.4569883939. The cubic root of 1166663554 is about 1052.7256633837.

The spelling of 1166663554 in words is "one billion, one hundred sixty-six million, six hundred sixty-three thousand, five hundred fifty-four".