66207072 has 48 divisors (see below), whose sum is σ = 179407872. Its totient is φ = 21356160.

The previous prime is 66207049. The next prime is 66207073. The reversal of 66207072 is 27070266.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66207073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8148 + ... + 14099.

It is an arithmetic number, because the mean of its divisors is an integer number (3737664).

Almost surely, 2^66207072 is an apocalyptic number.

66207072 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

66207072 is an abundant number, since it is smaller than the sum of its proper divisors (113200800).

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

66207072 is a wasteful number, since it uses less digits than its factorization.

66207072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22291 (or 22283 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 66207072 is about 8136.7728246523. The cubic root of 66207072 is about 404.5462010553.

The spelling of 66207072 in words is "sixty-six million, two hundred seven thousand, seventy-two".