666273735 has 16 divisors (see below), whose sum is σ = 1184486880. Its totient is φ = 355345920.

The previous prime is 666273719. The next prime is 666273737. The reversal of 666273735 is 537372666.

It is not a de Polignac number, because 666273735 - 2⁴ = 666273719 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666273737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2467546 + ... + 2467815.

It is an arithmetic number, because the mean of its divisors is an integer number (74030430).

Almost surely, 2^666273735 is an apocalyptic number.

666273735 is a deficient number, since it is larger than the sum of its proper divisors (518213145).

666273735 is a wasteful number, since it uses less digits than its factorization.

666273735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4935375 (or 4935369 counting only the distinct ones).

The product of its digits is 952560, while the sum is 45.

The square root of 666273735 is about 25812.2787641851. The cubic root of 666273735 is about 873.4088022921.

The spelling of 666273735 in words is "six hundred sixty-six million, two hundred seventy-three thousand, seven hundred thirty-five".