66539146 has 32 divisors (see below), whose sum is σ = 106178688. Its totient is φ = 31234560.

The previous prime is 66539129. The next prime is 66539147. The reversal of 66539146 is 64193566.

It is a junction number, because it is equal to n+sod(n) for n = 66539099 and 66539108.

It is not an unprimeable number, because it can be changed into a prime (66539147) 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, 398355 + ... + 398521.

It is an arithmetic number, because the mean of its divisors is an integer number (3318084).

Almost surely, 2^66539146 is an apocalyptic number.

66539146 is a deficient number, since it is larger than the sum of its proper divisors (39639542).

66539146 is a wasteful number, since it uses less digits than its factorization.

66539146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366.

The product of its digits is 116640, while the sum is 40.

The square root of 66539146 is about 8157.1530572866. The cubic root of 66539146 is about 405.2214325353.

The spelling of 66539146 in words is "sixty-six million, five hundred thirty-nine thousand, one hundred forty-six".