666234059 has 4 divisors (see below), whose sum is σ = 666291480. Its totient is φ = 666176640.

The previous prime is 666234047. The next prime is 666234061. The reversal of 666234059 is 950432666.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 950432666 = 2 ⋅475216333.

It is a cyclic number.

It is not a de Polignac number, because 666234059 - 2⁴ = 666234043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666234559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4502 + ... + 36779.

It is an arithmetic number, because the mean of its divisors is an integer number (166572870).

Almost surely, 2^666234059 is an apocalyptic number.

666234059 is a deficient number, since it is larger than the sum of its proper divisors (57421).

666234059 is a wasteful number, since it uses less digits than its factorization.

666234059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57420.

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 666234059 is about 25811.5102037831. The cubic root of 666234059 is about 873.3914650458.

The spelling of 666234059 in words is "six hundred sixty-six million, two hundred thirty-four thousand, fifty-nine".