66025645 has 8 divisors (see below), whose sum is σ = 90549504. Its totient is φ = 45274704.

The previous prime is 66025591. The next prime is 66025657. The reversal of 66025645 is 54652066.

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 66025645 - 2⁷ = 66025517 is a prime.

It is a super-3 number, since 3×66025645³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66025645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 943189 + ... + 943258.

It is an arithmetic number, because the mean of its divisors is an integer number (11318688).

Almost surely, 2^66025645 is an apocalyptic number.

It is an amenable number.

66025645 is a deficient number, since it is larger than the sum of its proper divisors (24523859).

66025645 is a wasteful number, since it uses less digits than its factorization.

66025645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886459.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 66025645 is about 8125.6165919886. The cubic root of 66025645 is about 404.1763375067.

The spelling of 66025645 in words is "sixty-six million, twenty-five thousand, six hundred forty-five".