618991662 has 8 divisors (see below), whose sum is σ = 1237983336. Its totient is φ = 206330552.

The previous prime is 618991661. The next prime is 618991693. The reversal of 618991662 is 266199816.

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

618991662 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618991661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51582633 + ... + 51582644.

It is an arithmetic number, because the mean of its divisors is an integer number (154747917).

Almost surely, 2^618991662 is an apocalyptic number.

618991662 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

618991662 is a wasteful number, since it uses less digits than its factorization.

618991662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103165282.

The product of its digits is 279936, while the sum is 48.

The square root of 618991662 is about 24879.5430424274. The cubic root of 618991662 is about 852.2393831308.

The spelling of 618991662 in words is "six hundred eighteen million, nine hundred ninety-one thousand, six hundred sixty-two".