66917413 has 8 divisors (see below), whose sum is σ = 69360480. Its totient is φ = 64483440.

The previous prime is 66917407. The next prime is 66917441. The reversal of 66917413 is 31471966.

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 66917413 - 2⁵ = 66917381 is a prime.

It is a super-2 number, since 2×66917413² = 8955880325225138, which contains 22 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 (66917483) 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, 15058 + ... + 18988.

It is an arithmetic number, because the mean of its divisors is an integer number (8670060).

Almost surely, 2^66917413 is an apocalyptic number.

It is an amenable number.

66917413 is a deficient number, since it is larger than the sum of its proper divisors (2443067).

66917413 is a wasteful number, since it uses less digits than its factorization.

66917413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4547.

The product of its digits is 27216, while the sum is 37.

The square root of 66917413 is about 8180.3064123540. The cubic root of 66917413 is about 405.9878602985.

The spelling of 66917413 in words is "sixty-six million, nine hundred seventeen thousand, four hundred thirteen".