66031061 has 8 divisors (see below), whose sum is σ = 69592800. Its totient is φ = 62478000.

The previous prime is 66031039. The next prime is 66031079. The reversal of 66031061 is 16013066.

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 66031061 - 2¹⁴ = 66014677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66031081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18686 + ... + 21936.

It is an arithmetic number, because the mean of its divisors is an integer number (8699100).

Almost surely, 2^66031061 is an apocalyptic number.

It is an amenable number.

66031061 is a deficient number, since it is larger than the sum of its proper divisors (3561739).

66031061 is a wasteful number, since it uses less digits than its factorization.

66031061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4339.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 66031061 is about 8125.9498521711. The cubic root of 66031061 is about 404.1873885621.

The spelling of 66031061 in words is "sixty-six million, thirty-one thousand, sixty-one".