66660476 has 24 divisors (see below), whose sum is σ = 120267840. Its totient is φ = 32311872.

The previous prime is 66660469. The next prime is 66660479. The reversal of 66660476 is 67406666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66660479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18866 + ... + 22118.

It is an arithmetic number, because the mean of its divisors is an integer number (5011160).

Almost surely, 2^66660476 is an apocalyptic number.

It is an amenable number.

66660476 is a deficient number, since it is larger than the sum of its proper divisors (53607364).

66660476 is a wasteful number, since it uses less digits than its factorization.

66660476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3413 (or 3411 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 41.

The square root of 66660476 is about 8164.5867011135. The cubic root of 66660476 is about 405.4675816880.

The spelling of 66660476 in words is "sixty-six million, six hundred sixty thousand, four hundred seventy-six".