666758083 has 4 divisors (see below), whose sum is σ = 666826768. Its totient is φ = 666689400.

The previous prime is 666758069. The next prime is 666758117. The reversal of 666758083 is 380857666.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 666758083 - 2⁹ = 666757571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666758383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16791 + ... + 40192.

It is an arithmetic number, because the mean of its divisors is an integer number (166706692).

Almost surely, 2^666758083 is an apocalyptic number.

666758083 is a deficient number, since it is larger than the sum of its proper divisors (68685).

666758083 is a wasteful number, since it uses less digits than its factorization.

666758083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68684.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The square root of 666758083 is about 25821.6591837163. The cubic root of 666758083 is about 873.6203926728.

The spelling of 666758083 in words is "six hundred sixty-six million, seven hundred fifty-eight thousand, eighty-three".