66901272 has 16 divisors (see below), whose sum is σ = 167253240. Its totient is φ = 22300416.

The previous prime is 66901271. The next prime is 66901277. The reversal of 66901272 is 27210966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66901271) 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, 1393753 + ... + 1393800.

Almost surely, 2^66901272 is an apocalyptic number.

It is an amenable number.

66901272 is an abundant number, since it is smaller than the sum of its proper divisors (100351968).

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

66901272 is a wasteful number, since it uses less digits than its factorization.

66901272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2787562 (or 2787558 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 66901272 is about 8179.3197761183. The cubic root of 66901272 is about 405.9552151981.

The spelling of 66901272 in words is "sixty-six million, nine hundred one thousand, two hundred seventy-two".