66196531 has 8 divisors (see below), whose sum is σ = 68832720. Its totient is φ = 63583968.

The previous prime is 66196517. The next prime is 66196541. The reversal of 66196531 is 13569166.

66196531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 66196531 - 2²¹ = 64099379 is a prime.

It is a super-2 number, since 2×66196531² = 8763961432867922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66196541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81 + ... + 11506.

It is an arithmetic number, because the mean of its divisors is an integer number (8604090).

Almost surely, 2^66196531 is an apocalyptic number.

66196531 is a deficient number, since it is larger than the sum of its proper divisors (2636189).

66196531 is a wasteful number, since it uses less digits than its factorization.

66196531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11813.

The product of its digits is 29160, while the sum is 37.

The square root of 66196531 is about 8136.1250604941. The cubic root of 66196531 is about 404.5247302984.

The spelling of 66196531 in words is "sixty-six million, one hundred ninety-six thousand, five hundred thirty-one".