66556492 has 6 divisors (see below), whose sum is σ = 116473868. Its totient is φ = 33278244.

The previous prime is 66556471. The next prime is 66556493. The reversal of 66556492 is 29465566.

It is not an unprimeable number, because it can be changed into a prime (66556493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8319558 + ... + 8319565.

Almost surely, 2^66556492 is an apocalyptic number.

It is an amenable number.

66556492 is a deficient number, since it is larger than the sum of its proper divisors (49917376).

66556492 is a wasteful number, since it uses less digits than its factorization.

66556492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16639127 (or 16639125 counting only the distinct ones).

The product of its digits is 388800, while the sum is 43.

The square root of 66556492 is about 8158.2162266025. The cubic root of 66556492 is about 405.2566416851.

The spelling of 66556492 in words is "sixty-six million, five hundred fifty-six thousand, four hundred ninety-two".