66663468 has 18 divisors (see below), whose sum is σ = 168510524. Its totient is φ = 22221144.

The previous prime is 66663449. The next prime is 66663469. The reversal of 66663468 is 86436666.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (66663469) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 925846 + ... + 925917.

Almost surely, 2^66663468 is an apocalyptic number.

It is an amenable number.

66663468 is an abundant number, since it is smaller than the sum of its proper divisors (101847056).

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

66663468 is a wasteful number, since it uses less digits than its factorization.

66663468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851773 (or 1851768 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The square root of 66663468 is about 8164.7699293979. The cubic root of 66663468 is about 405.4736479556.

The spelling of 66663468 in words is "sixty-six million, six hundred sixty-three thousand, four hundred sixty-eight".