66117405 has 8 divisors (see below), whose sum is σ = 105787872. Its totient is φ = 35262608.

The previous prime is 66117383. The next prime is 66117413. The reversal of 66117405 is 50471166.

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 66117405 - 2¹⁰ = 66116381 is a prime.

It is a super-2 number, since 2×66117405² = 8743022487868050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2203899 + ... + 2203928.

It is an arithmetic number, because the mean of its divisors is an integer number (13223484).

Almost surely, 2^66117405 is an apocalyptic number.

It is an amenable number.

66117405 is a deficient number, since it is larger than the sum of its proper divisors (39670467).

66117405 is a wasteful number, since it uses less digits than its factorization.

66117405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4407835.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 66117405 is about 8131.2609723216. The cubic root of 66117405 is about 404.3634872784.

The spelling of 66117405 in words is "sixty-six million, one hundred seventeen thousand, four hundred five".