66470785117 has 8 divisors (see below), whose sum is σ = 72677276640. Its totient is φ = 60291575760.

The previous prime is 66470785099. The next prime is 66470785123. The reversal of 66470785117 is 71158707466.

It is a happy number.

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 66470785117 - 2²³ = 66462396509 is a prime.

It is a super-4 number, since 4×66470785117⁴ (a number of 44 digits) contains 4444 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 (66470785177) 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, 6815442 + ... + 6825187.

It is an arithmetic number, because the mean of its divisors is an integer number (9084659580).

Almost surely, 2^66470785117 is an apocalyptic number.

It is an amenable number.

66470785117 is a deficient number, since it is larger than the sum of its proper divisors (6206491523).

66470785117 is a wasteful number, since it uses less digits than its factorization.

66470785117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13641083.

The product of its (nonzero) digits is 1975680, while the sum is 52.

The spelling of 66470785117 in words is "sixty-six billion, four hundred seventy million, seven hundred eighty-five thousand, one hundred seventeen".