666068537 has 8 divisors (see below), whose sum is σ = 689824512. Its totient is φ = 642712000.

The previous prime is 666068527. The next prime is 666068539. The reversal of 666068537 is 735860666.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 666068537 - 2⁴ = 666068521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666068491 and 666068500.

It is not an unprimeable number, because it can be changed into a prime (666068539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96464 + ... + 103137.

It is an arithmetic number, because the mean of its divisors is an integer number (86228064).

Almost surely, 2^666068537 is an apocalyptic number.

It is an amenable number.

666068537 is a deficient number, since it is larger than the sum of its proper divisors (23755975).

666068537 is a wasteful number, since it uses less digits than its factorization.

666068537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199719.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The square root of 666068537 is about 25808.3036443700. The cubic root of 666068537 is about 873.3191293684.

The spelling of 666068537 in words is "six hundred sixty-six million, sixty-eight thousand, five hundred thirty-seven".