66708471 has 8 divisors (see below), whose sum is σ = 88984960. Its totient is φ = 44452152.

The previous prime is 66708457. The next prime is 66708479. The reversal of 66708471 is 17480766.

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

It is not a de Polignac number, because 66708471 - 2⁶ = 66708407 is a prime.

It is a super-3 number, since 3×66708471³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66708479) 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, 6366 + ... + 13188.

It is an arithmetic number, because the mean of its divisors is an integer number (11123120).

Almost surely, 2^66708471 is an apocalyptic number.

66708471 is a deficient number, since it is larger than the sum of its proper divisors (22276489).

66708471 is a wasteful number, since it uses less digits than its factorization.

66708471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10085.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 66708471 is about 8167.5253902268. The cubic root of 66708471 is about 405.5648694622.

The spelling of 66708471 in words is "sixty-six million, seven hundred eight thousand, four hundred seventy-one".