66947153 has 12 divisors (see below), whose sum is σ = 82850688. Its totient is φ = 52968240.

The previous prime is 66947147. The next prime is 66947201. The reversal of 66947153 is 35174966.

It is not a de Polignac number, because 66947153 - 2¹⁰ = 66946129 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66947153.

It is not an unprimeable number, because it can be changed into a prime (66947753) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27113 + ... + 29478.

It is an arithmetic number, because the mean of its divisors is an integer number (6904224).

Almost surely, 2^66947153 is an apocalyptic number.

It is an amenable number.

66947153 is a deficient number, since it is larger than the sum of its proper divisors (15903535).

66947153 is a wasteful number, since it uses less digits than its factorization.

66947153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56624 (or 56611 counting only the distinct ones).

The product of its digits is 136080, while the sum is 41.

The square root of 66947153 is about 8182.1239907496. The cubic root of 66947153 is about 406.0479955716.

The spelling of 66947153 in words is "sixty-six million, nine hundred forty-seven thousand, one hundred fifty-three".