66131234 has 8 divisors (see below), whose sum is σ = 106827420. Its totient is φ = 30522096.

The previous prime is 66131231. The next prime is 66131239. The reversal of 66131234 is 43213166.

It can be written as a sum of positive squares in 2 ways, for example, as 64561225 + 1570009 = 8035^2 + 1253^2 .

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

It is a super-2 number, since 2×66131234² = 8746680220725512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 2543509 = 66131234 / (6 + 6 + 1 + 3 + 1 + 2 + 3 + 4).

It is not an unprimeable number, because it can be changed into a prime (66131231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1271729 + ... + 1271780.

Almost surely, 2^66131234 is an apocalyptic number.

66131234 is a deficient number, since it is larger than the sum of its proper divisors (40696186).

66131234 is a wasteful number, since it uses less digits than its factorization.

66131234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2543524.

The product of its digits is 2592, while the sum is 26.

The square root of 66131234 is about 8132.1112879744. Note that the first 3 decimals coincide. The cubic root of 66131234 is about 404.3916772981.

The spelling of 66131234 in words is "sixty-six million, one hundred thirty-one thousand, two hundred thirty-four".