66473761 has 8 divisors (see below), whose sum is σ = 70328000. Its totient is φ = 62655120.

The previous prime is 66473753. The next prime is 66473777. The reversal of 66473761 is 16737466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66473761 - 2³ = 66473753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66473711) 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, 5010 + ... + 12571.

It is an arithmetic number, because the mean of its divisors is an integer number (8791000).

Almost surely, 2^66473761 is an apocalyptic number.

It is an amenable number.

66473761 is a deficient number, since it is larger than the sum of its proper divisors (3854239).

66473761 is a wasteful number, since it uses less digits than its factorization.

66473761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17799.

The product of its digits is 127008, while the sum is 40.

The square root of 66473761 is about 8153.1442401076. The cubic root of 66473761 is about 405.0886581295.

The spelling of 66473761 in words is "sixty-six million, four hundred seventy-three thousand, seven hundred sixty-one".