66025869 has 32 divisors (see below), whose sum is σ = 108810240. Its totient is φ = 34679232.

The previous prime is 66025859. The next prime is 66025873. The reversal of 66025869 is 96852066.

It is not a de Polignac number, because 66025869 - 2⁹ = 66025357 is a prime.

It is a super-2 number, since 2×66025869² = 8718830754410322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66025869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66025819) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99862 + ... + 100520.

It is an arithmetic number, because the mean of its divisors is an integer number (3400320).

Almost surely, 2^66025869 is an apocalyptic number.

It is an amenable number.

66025869 is a deficient number, since it is larger than the sum of its proper divisors (42784371).

66025869 is a wasteful number, since it uses less digits than its factorization.

66025869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 66025869 is about 8125.6303755463. The cubic root of 66025869 is about 404.1767945786.

The spelling of 66025869 in words is "sixty-six million, twenty-five thousand, eight hundred sixty-nine".