66011725 has 24 divisors (see below), whose sum is σ = 91994112. Its totient is φ = 46622400.

The previous prime is 66011723. The next prime is 66011747. The reversal of 66011725 is 52711066.

It is not a de Polignac number, because 66011725 - 2¹ = 66011723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66011693 and 66011702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66011723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3060 + ... + 11890.

It is an arithmetic number, because the mean of its divisors is an integer number (3833088).

Almost surely, 2^66011725 is an apocalyptic number.

66011725 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66011725 is a deficient number, since it is larger than the sum of its proper divisors (25982387).

66011725 is a wasteful number, since it uses less digits than its factorization.

66011725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8877 (or 8872 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 66011725 is about 8124.7599964553. The cubic root of 66011725 is about 404.1479317257.

The spelling of 66011725 in words is "sixty-six million, eleven thousand, seven hundred twenty-five".