66530492 has 12 divisors (see below), whose sum is σ = 133061040. Its totient is φ = 28513056.

The previous prime is 66530491. The next prime is 66530501. The reversal of 66530492 is 29403566.

66530492 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66530491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1188017 + ... + 1188072.

It is an arithmetic number, because the mean of its divisors is an integer number (11088420).

Almost surely, 2^66530492 is an apocalyptic number.

It is an amenable number.

66530492 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66530492 is a wasteful number, since it uses less digits than its factorization.

66530492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2376100 (or 2376098 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 66530492 is about 8156.6225853597. The cubic root of 66530492 is about 405.2038642389.

The spelling of 66530492 in words is "sixty-six million, five hundred thirty thousand, four hundred ninety-two".