66267401788 has 12 divisors (see below), whose sum is σ = 132534803632. Its totient is φ = 28400315040.

The previous prime is 66267401743. The next prime is 66267401801. The reversal of 66267401788 is 88710476266.

66267401788 is an admirable number.

It is a super-5 number, since 5×66267401788⁵ (a number of 55 digits) contains 55555 as substring.

It is a hoax number, since the sum of its digits (55) 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 3 ways as a sum of consecutive naturals, for example, 1183346433 + ... + 1183346488.

Almost surely, 2^66267401788 is an apocalyptic number.

It is an amenable number.

66267401788 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.

66267401788 is a wasteful number, since it uses less digits than its factorization.

66267401788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366692932 (or 2366692930 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 55.

The spelling of 66267401788 in words is "sixty-six billion, two hundred sixty-seven million, four hundred one thousand, seven hundred eighty-eight".