66713547 has 8 divisors (see below), whose sum is σ = 92818944. Its totient is φ = 42541928.

The previous prime is 66713533. The next prime is 66713551. The reversal of 66713547 is 74531766.

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 66713547 - 2⁷ = 66713419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66713527) 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, 483363 + ... + 483500.

It is an arithmetic number, because the mean of its divisors is an integer number (11602368).

Almost surely, 2^66713547 is an apocalyptic number.

66713547 is a deficient number, since it is larger than the sum of its proper divisors (26105397).

66713547 is a wasteful number, since it uses less digits than its factorization.

66713547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966889.

The product of its digits is 105840, while the sum is 39.

The square root of 66713547 is about 8167.8361271514. The cubic root of 66713547 is about 405.5751559872.

The spelling of 66713547 in words is "sixty-six million, seven hundred thirteen thousand, five hundred forty-seven".