666053499 has 8 divisors (see below), whose sum is σ = 901326400. Its totient is φ = 437408136.

The previous prime is 666053467. The next prime is 666053513. The reversal of 666053499 is 994350666.

It is a happy number.

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

It is not a de Polignac number, because 666053499 - 2⁵ = 666053467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666051499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1656649 + ... + 1657050.

It is an arithmetic number, because the mean of its divisors is an integer number (112665800).

Almost surely, 2^666053499 is an apocalyptic number.

666053499 is a deficient number, since it is larger than the sum of its proper divisors (235272901).

666053499 is a wasteful number, since it uses less digits than its factorization.

666053499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3313769.

The product of its (nonzero) digits is 1049760, while the sum is 48.

The square root of 666053499 is about 25808.0123023839. The cubic root of 666053499 is about 873.3125569357.

The spelling of 666053499 in words is "six hundred sixty-six million, fifty-three thousand, four hundred ninety-nine".