618667671 has 8 divisors (see below), whose sum is σ = 826729200. Its totient is φ = 411525632.

The previous prime is 618667667. The next prime is 618667711. The reversal of 618667671 is 176766816.

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

It is a cyclic number.

It is not a de Polignac number, because 618667671 - 2² = 618667667 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 618667671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618667601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228300 + ... + 230993.

It is an arithmetic number, because the mean of its divisors is an integer number (103341150).

Almost surely, 2^618667671 is an apocalyptic number.

618667671 is a deficient number, since it is larger than the sum of its proper divisors (208061529).

618667671 is a wasteful number, since it uses less digits than its factorization.

618667671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459745.

The product of its digits is 508032, while the sum is 48.

The square root of 618667671 is about 24873.0309974478. The cubic root of 618667671 is about 852.0906648761.

The spelling of 618667671 in words is "six hundred eighteen million, six hundred sixty-seven thousand, six hundred seventy-one".