618660471 has 32 divisors (see below), whose sum is σ = 979147008. Its totient is φ = 342512640.

The previous prime is 618660443. The next prime is 618660499. The reversal of 618660471 is 174066816.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (618660443) and next prime (618660499).

It is not a de Polignac number, because 618660471 - 2⁹ = 618659959 is a prime.

It is a super-3 number, since 3×618660471³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618660421) 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, 34180 + ... + 49046.

It is an arithmetic number, because the mean of its divisors is an integer number (30598344).

Almost surely, 2^618660471 is an apocalyptic number.

618660471 is a deficient number, since it is larger than the sum of its proper divisors (360486537).

618660471 is a wasteful number, since it uses less digits than its factorization.

618660471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14991.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 618660471 is about 24872.8862619520. The cubic root of 618660471 is about 852.0873593445.

The spelling of 618660471 in words is "six hundred eighteen million, six hundred sixty thousand, four hundred seventy-one".