116667778 has 4 divisors (see below), whose sum is σ = 175001670. Its totient is φ = 58333888.

The previous prime is 116667767. The next prime is 116667779. The reversal of 116667778 is 877766611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 877766611 = 43 ⋅20413177.

It can be written as a sum of positive squares in only one way, i.e., 116488849 + 178929 = 10793^2 + 423^2 .

It is a super-2 number, since 2×116667778² = 27222740846914568, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (116667779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29166943 + ... + 29166946.

Almost surely, 2^116667778 is an apocalyptic number.

116667778 is a deficient number, since it is larger than the sum of its proper divisors (58333892).

116667778 is an equidigital number, since it uses as much as digits as its factorization.

116667778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58333891.

The product of its digits is 592704, while the sum is 49.

The square root of 116667778 is about 10801.2859419608. The cubic root of 116667778 is about 488.6339544787.

The spelling of 116667778 in words is "one hundred sixteen million, six hundred sixty-seven thousand, seven hundred seventy-eight".