66131830 has 8 divisors (see below), whose sum is σ = 119037312. Its totient is φ = 26452728.

The previous prime is 66131801. The next prime is 66131843. The reversal of 66131830 is 3813166.

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

It is a congruent 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, 3306582 + ... + 3306601.

It is an arithmetic number, because the mean of its divisors is an integer number (14879664).

Almost surely, 2^66131830 is an apocalyptic number.

66131830 is a deficient number, since it is larger than the sum of its proper divisors (52905482).

66131830 is a wasteful number, since it uses less digits than its factorization.

66131830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6613190.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 66131830 is about 8132.1479327420. The cubic root of 66131830 is about 404.3928921386.

Adding to 66131830 its reverse (3813166), we get a palindrome (69944996).

The spelling of 66131830 in words is "sixty-six million, one hundred thirty-one thousand, eight hundred thirty".