66531353 has 16 divisors (see below), whose sum is σ = 80737920. Its totient is φ = 53519616.

The previous prime is 66531343. The next prime is 66531359. The reversal of 66531353 is 35313566.

It is a cyclic number.

It is not a de Polignac number, because 66531353 - 2⁸ = 66531097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66531359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61703 + ... + 62771.

It is an arithmetic number, because the mean of its divisors is an integer number (5046120).

Almost surely, 2^66531353 is an apocalyptic number.

It is an amenable number.

66531353 is a deficient number, since it is larger than the sum of its proper divisors (14206567).

66531353 is a wasteful number, since it uses less digits than its factorization.

66531353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616.

The product of its digits is 24300, while the sum is 32.

The square root of 66531353 is about 8156.6753643871. The cubic root of 66531353 is about 405.2056122045.

The spelling of 66531353 in words is "sixty-six million, five hundred thirty-one thousand, three hundred fifty-three".