116666401 has 2 divisors, whose sum is σ = 116666402. Its totient is φ = 116666400.

The previous prime is 116666399. The next prime is 116666411. The reversal of 116666401 is 104666611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100020001 + 16646400 = 10001^2 + 4080^2 .

It is a cyclic number.

It is not a de Polignac number, because 116666401 - 2¹ = 116666399 is a prime.

It is a super-2 number, since 2×116666401² = 27222098244585602, which contains 22 as substring.

Together with 116666399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (116666411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58333200 + 58333201.

It is an arithmetic number, because the mean of its divisors is an integer number (58333201).

Almost surely, 2^116666401 is an apocalyptic number.

It is an amenable number.

116666401 is a deficient number, since it is larger than the sum of its proper divisors (1).

116666401 is an equidigital number, since it uses as much as digits as its factorization.

116666401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 116666401 is about 10801.2221993624. Note that the first 3 decimals coincide. The cubic root of 116666401 is about 488.6320320639.

The spelling of 116666401 in words is "one hundred sixteen million, six hundred sixty-six thousand, four hundred one".