666532671 has 16 divisors (see below), whose sum is σ = 1016246784. Its totient is φ = 380659104.

The previous prime is 666532649. The next prime is 666532693. The reversal of 666532671 is 176235666.

It is an interprime number because it is at equal distance from previous prime (666532649) and next prime (666532693).

It is not a de Polignac number, because 666532671 - 2¹³ = 666524479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666532621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33390 + ... + 49476.

It is an arithmetic number, because the mean of its divisors is an integer number (63515424).

Almost surely, 2^666532671 is an apocalyptic number.

666532671 is a deficient number, since it is larger than the sum of its proper divisors (349714113).

666532671 is a wasteful number, since it uses less digits than its factorization.

666532671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18070.

The product of its digits is 272160, while the sum is 42.

The square root of 666532671 is about 25817.2940293905. The cubic root of 666532671 is about 873.5219328162.

The spelling of 666532671 in words is "six hundred sixty-six million, five hundred thirty-two thousand, six hundred seventy-one".