66012072 has 32 divisors (see below), whose sum is σ = 188606400. Its totient is φ = 18860544.

The previous prime is 66012043. The next prime is 66012119. The reversal of 66012072 is 27021066.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 196297 + ... + 196632.

It is an arithmetic number, because the mean of its divisors is an integer number (5893950).

Almost surely, 2^66012072 is an apocalyptic number.

It is an amenable number.

66012072 is an abundant number, since it is smaller than the sum of its proper divisors (122594328).

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

66012072 is a wasteful number, since it uses less digits than its factorization.

66012072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392945 (or 392941 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 66012072 is about 8124.7813509042. The cubic root of 66012072 is about 404.1486398781.

The spelling of 66012072 in words is "sixty-six million, twelve thousand, seventy-two".