66773412 has 36 divisors (see below), whose sum is σ = 169552656. Its totient is φ = 22157040.

The previous prime is 66773401. The next prime is 66773449. The reversal of 66773412 is 21437766.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4087 + ... + 12257.

It is an arithmetic number, because the mean of its divisors is an integer number (4709796).

Almost surely, 2^66773412 is an apocalyptic number.

It is a pronic number, being equal to 8171×8172.

It is an amenable number.

66773412 is an abundant number, since it is smaller than the sum of its proper divisors (102779244).

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

66773412 is a wasteful number, since it uses less digits than its factorization.

66773412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8408 (or 8403 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 66773412 is about 8171.4999847029. The cubic root of 66773412 is about 405.6964331939.

The spelling of 66773412 in words is "sixty-six million, seven hundred seventy-three thousand, four hundred twelve".