666071357 has 32 divisors (see below), whose sum is σ = 804864000. Its totient is φ = 550643184.

The previous prime is 666071327. The next prime is 666071389. The reversal of 666071357 is 753170666.

It is not a de Polignac number, because 666071357 - 2⁶ = 666071293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666071327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1273298 + ... + 1273820.

It is an arithmetic number, because the mean of its divisors is an integer number (25152000).

Almost surely, 2^666071357 is an apocalyptic number.

It is an amenable number.

666071357 is a deficient number, since it is larger than the sum of its proper divisors (138792643).

666071357 is an equidigital number, since it uses as much as digits as its factorization.

666071357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 656 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 41.

The square root of 666071357 is about 25808.3582778913. The cubic root of 666071357 is about 873.3203618524.

The spelling of 666071357 in words is "six hundred sixty-six million, seventy-one thousand, three hundred fifty-seven".