66271372 has 24 divisors (see below), whose sum is σ = 128138976. Its totient is φ = 29829888.

The previous prime is 66271339. The next prime is 66271379. The reversal of 66271372 is 27317266.

It is a happy number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (66271379) 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, 19623 + ... + 22750.

It is an arithmetic number, because the mean of its divisors is an integer number (5339124).

Almost surely, 2^66271372 is an apocalyptic number.

It is an amenable number.

66271372 is a deficient number, since it is larger than the sum of its proper divisors (61867604).

66271372 is a wasteful number, since it uses less digits than its factorization.

66271372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42417 (or 42415 counting only the distinct ones).

The product of its digits is 21168, while the sum is 34.

The square root of 66271372 is about 8140.7230637088. The cubic root of 66271372 is about 404.6771231429.

The spelling of 66271372 in words is "sixty-six million, two hundred seventy-one thousand, three hundred seventy-two".