66927072 has 24 divisors (see below), whose sum is σ = 175683816. Its totient is φ = 22308992.

The previous prime is 66927067. The next prime is 66927073. The reversal of 66927072 is 27072966.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 66927072.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66927073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348483 + ... + 348674.

It is an arithmetic number, because the mean of its divisors is an integer number (7320159).

Almost surely, 2^66927072 is an apocalyptic number.

It is an amenable number.

66927072 is an abundant number, since it is smaller than the sum of its proper divisors (108756744).

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

66927072 is a wasteful number, since it uses less digits than its factorization.

66927072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697170 (or 697162 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 66927072 is about 8180.8967723594. The cubic root of 66927072 is about 406.0073930724.

The spelling of 66927072 in words is "sixty-six million, nine hundred twenty-seven thousand, seventy-two".