66957053 has 4 divisors (see below), whose sum is σ = 67956480. Its totient is φ = 65957628.

The previous prime is 66957049. The next prime is 66957061. The reversal of 66957053 is 35075966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66957053 - 2² = 66957049 is a prime.

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 66957053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66957043) 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, 499613 + ... + 499746.

It is an arithmetic number, because the mean of its divisors is an integer number (16989120).

Almost surely, 2^66957053 is an apocalyptic number.

It is an amenable number.

66957053 is a deficient number, since it is larger than the sum of its proper divisors (999427).

66957053 is an equidigital number, since it uses as much as digits as its factorization.

66957053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999426.

The product of its (nonzero) digits is 170100, while the sum is 41.

The square root of 66957053 is about 8182.7289457735. The cubic root of 66957053 is about 406.0680097512.

The spelling of 66957053 in words is "sixty-six million, nine hundred fifty-seven thousand, fifty-three".