66402545 has 8 divisors (see below), whose sum is σ = 86927040. Its totient is φ = 48292720.

The previous prime is 66402533. The next prime is 66402559. The reversal of 66402545 is 54520466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66402545 - 2¹⁰ = 66401521 is a prime.

It is a Curzon 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, 603605 + ... + 603714.

It is an arithmetic number, because the mean of its divisors is an integer number (10865880).

Almost surely, 2^66402545 is an apocalyptic number.

It is an amenable number.

66402545 is a deficient number, since it is larger than the sum of its proper divisors (20524495).

66402545 is a wasteful number, since it uses less digits than its factorization.

66402545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207335.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 66402545 is about 8148.7756749097. The cubic root of 66402545 is about 404.9439438750.

The spelling of 66402545 in words is "sixty-six million, four hundred two thousand, five hundred forty-five".