618020664 has 32 divisors (see below), whose sum is σ = 1549944720. Its totient is φ = 205354496.

The previous prime is 618020647. The next prime is 618020671. The reversal of 618020664 is 466020816.

It is a happy number.

It is a super-2 number, since 2×618020664² = 763899082262001792, which contains 22 as substring.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33009 + ... + 48224.

Almost surely, 2^618020664 is an apocalyptic number.

It is an amenable number.

618020664 is an abundant number, since it is smaller than the sum of its proper divisors (931924056).

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

618020664 is a wasteful number, since it uses less digits than its factorization.

618020664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81559 (or 81555 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 618020664 is about 24860.0213998299. The cubic root of 618020664 is about 851.7935204641.

The spelling of 618020664 in words is "six hundred eighteen million, twenty thousand, six hundred sixty-four".