66131090 has 8 divisors (see below), whose sum is σ = 119035980. Its totient is φ = 26452432.

The previous prime is 66131089. The next prime is 66131111. The reversal of 66131090 is 9013166.

It can be written as a sum of positive squares in 2 ways, for example, as 65593801 + 537289 = 8099^2 + 733^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3306545 + ... + 3306564.

Almost surely, 2^66131090 is an apocalyptic number.

66131090 is a deficient number, since it is larger than the sum of its proper divisors (52904890).

66131090 is a wasteful number, since it uses less digits than its factorization.

66131090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6613116.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 66131090 is about 8132.1024341802. The cubic root of 66131090 is about 404.3913837785.

The spelling of 66131090 in words is "sixty-six million, one hundred thirty-one thousand, ninety".