66531363 has 32 divisors (see below), whose sum is σ = 95158272. Its totient is φ = 41277600.

The previous prime is 66531359. The next prime is 66531383. The reversal of 66531363 is 36313566.

It is not a de Polignac number, because 66531363 - 2² = 66531359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66531343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 507808 + ... + 507938.

It is an arithmetic number, because the mean of its divisors is an integer number (2973696).

Almost surely, 2^66531363 is an apocalyptic number.

66531363 is a deficient number, since it is larger than the sum of its proper divisors (28626909).

66531363 is a wasteful number, since it uses less digits than its factorization.

66531363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335.

The product of its digits is 29160, while the sum is 33.

The square root of 66531363 is about 8156.6759773820. The cubic root of 66531363 is about 405.2056325059.

The spelling of 66531363 in words is "sixty-six million, five hundred thirty-one thousand, three hundred sixty-three".