666103671 has 24 divisors (see below), whose sum is σ = 988316784. Its totient is φ = 432051840.

The previous prime is 666103663. The next prime is 666103703. The reversal of 666103671 is 176301666.

It is not a de Polignac number, because 666103671 - 2³ = 666103663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666103601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144220 + ... + 148766.

It is an arithmetic number, because the mean of its divisors is an integer number (41179866).

Almost surely, 2^666103671 is an apocalyptic number.

666103671 is a deficient number, since it is larger than the sum of its proper divisors (322213113).

666103671 is a wasteful number, since it uses less digits than its factorization.

666103671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4991 (or 4988 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 666103671 is about 25808.9843077948. The cubic root of 666103671 is about 873.3344844723.

The spelling of 666103671 in words is "six hundred sixty-six million, one hundred three thousand, six hundred seventy-one".