66131246 has 32 divisors (see below), whose sum is σ = 105670656. Its totient is φ = 30996000.

The previous prime is 66131239. The next prime is 66131249. The reversal of 66131246 is 64213166.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66131249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 365276 + ... + 365456.

It is an arithmetic number, because the mean of its divisors is an integer number (3302208).

Almost surely, 2^66131246 is an apocalyptic number.

66131246 is a deficient number, since it is larger than the sum of its proper divisors (39539410).

66131246 is a wasteful number, since it uses less digits than its factorization.

66131246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368.

The product of its digits is 5184, while the sum is 29.

The square root of 66131246 is about 8132.1120257901. The cubic root of 66131246 is about 404.3917017580.

The spelling of 66131246 in words is "sixty-six million, one hundred thirty-one thousand, two hundred forty-six".