66403245 has 32 divisors (see below), whose sum is σ = 109486080. Its totient is φ = 34349120.

The previous prime is 66403229. The next prime is 66403273. The reversal of 66403245 is 54230466.

It is not a de Polignac number, because 66403245 - 2⁴ = 66403229 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91996 + ... + 92714.

It is an arithmetic number, because the mean of its divisors is an integer number (3421440).

Almost surely, 2^66403245 is an apocalyptic number.

It is an amenable number.

66403245 is a deficient number, since it is larger than the sum of its proper divisors (43082835).

66403245 is a wasteful number, since it uses less digits than its factorization.

66403245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 66403245 is about 8148.8186260341. The cubic root of 66403245 is about 404.9453668113.

The spelling of 66403245 in words is "sixty-six million, four hundred three thousand, two hundred forty-five".