116665557 has 4 divisors (see below), whose sum is σ = 155554080. Its totient is φ = 77777036.

The previous prime is 116665513. The next prime is 116665573. The reversal of 116665557 is 755566611.

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 an emirpimes, since its reverse is a distinct semiprime: 755566611 = 3 ⋅251855537.

It is a cyclic number.

It is not a de Polignac number, because 116665557 - 2¹⁴ = 116649173 is a prime.

It is a super-2 number, since 2×116665557² = 27221704380240498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116665357) 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, 19444257 + ... + 19444262.

It is an arithmetic number, because the mean of its divisors is an integer number (38888520).

Almost surely, 2^116665557 is an apocalyptic number.

It is an amenable number.

116665557 is a deficient number, since it is larger than the sum of its proper divisors (38888523).

116665557 is an equidigital number, since it uses as much as digits as its factorization.

116665557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38888522.

The product of its digits is 189000, while the sum is 42.

The square root of 116665557 is about 10801.1831296391. The cubic root of 116665557 is about 488.6308537571.

The spelling of 116665557 in words is "one hundred sixteen million, six hundred sixty-five thousand, five hundred fifty-seven".