66617045 has 16 divisors (see below), whose sum is σ = 88264512. Its totient is φ = 47861760.

The previous prime is 66617029. The next prime is 66617051. The reversal of 66617045 is 54071666.

It is not a de Polignac number, because 66617045 - 2⁴ = 66617029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66616996 and 66617014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2732 + ... + 11861.

It is an arithmetic number, because the mean of its divisors is an integer number (5516532).

Almost surely, 2^66617045 is an apocalyptic number.

It is an amenable number.

66617045 is a deficient number, since it is larger than the sum of its proper divisors (21647467).

66617045 is a wasteful number, since it uses less digits than its factorization.

66617045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14692.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 66617045 is about 8161.9265495347. The cubic root of 66617045 is about 405.3795050674.

The spelling of 66617045 in words is "sixty-six million, six hundred seventeen thousand, forty-five".