66136461 has 8 divisors (see below), whose sum is σ = 88222464. Its totient is φ = 44070720.

The previous prime is 66136459. The next prime is 66136471. The reversal of 66136461 is 16463166.

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

It is not a de Polignac number, because 66136461 - 2¹ = 66136459 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66136471) 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, 6021 + ... + 12981.

It is an arithmetic number, because the mean of its divisors is an integer number (11027808).

Almost surely, 2^66136461 is an apocalyptic number.

It is an amenable number.

66136461 is a deficient number, since it is larger than the sum of its proper divisors (22086003).

66136461 is a wasteful number, since it uses less digits than its factorization.

66136461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10131.

The product of its digits is 15552, while the sum is 33.

The square root of 66136461 is about 8132.4326618792. The cubic root of 66136461 is about 404.4023313642.

The spelling of 66136461 in words is "sixty-six million, one hundred thirty-six thousand, four hundred sixty-one".