666553235 has 4 divisors (see below), whose sum is σ = 799863888. Its totient is φ = 533242584.

The previous prime is 666553229. The next prime is 666553241. The reversal of 666553235 is 532355666.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (666553229) and next prime (666553241).

It is a cyclic number.

It is not a de Polignac number, because 666553235 - 2⁶ = 666553171 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666553192 and 666553201.

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, 66655319 + ... + 66655328.

It is an arithmetic number, because the mean of its divisors is an integer number (199965972).

Almost surely, 2^666553235 is an apocalyptic number.

666553235 is a deficient number, since it is larger than the sum of its proper divisors (133310653).

666553235 is a wasteful number, since it uses less digits than its factorization.

666553235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133310652.

The product of its digits is 486000, while the sum is 41.

The square root of 666553235 is about 25817.6922864922. The cubic root of 666553235 is about 873.5309160820.

The spelling of 666553235 in words is "six hundred sixty-six million, five hundred fifty-three thousand, two hundred thirty-five".