666414783 has 20 divisors (see below), whose sum is σ = 996246240. Its totient is φ = 443947392.

The previous prime is 666414703. The next prime is 666414787. The reversal of 666414783 is 387414666.

It is a happy number.

It is not a de Polignac number, because 666414783 - 2¹⁸ = 666152639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666414787) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 161338 + ... + 165416.

It is an arithmetic number, because the mean of its divisors is an integer number (49812312).

Almost surely, 2^666414783 is an apocalyptic number.

666414783 is a deficient number, since it is larger than the sum of its proper divisors (329831457).

666414783 is a wasteful number, since it uses less digits than its factorization.

666414783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6108 (or 6099 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 666414783 is about 25815.0108076677. The cubic root of 666414783 is about 873.4704305519.

The spelling of 666414783 in words is "six hundred sixty-six million, four hundred fourteen thousand, seven hundred eighty-three".