66503394 has 48 divisors (see below), whose sum is σ = 149287320. Its totient is φ = 21381120.

The previous prime is 66503387. The next prime is 66503417. The reversal of 66503394 is 49330566.

66503394 is a `hidden beast` number, since 66 + 503 + 3 + 94 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 18020025 + 48483369 = 4245^2 + 6963^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71122 + ... + 72050.

Almost surely, 2^66503394 is an apocalyptic number.

66503394 is an abundant number, since it is smaller than the sum of its proper divisors (82783926).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66503394 is a wasteful number, since it uses less digits than its factorization.

66503394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075 (or 1072 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 66503394 is about 8154.9613119867. The cubic root of 66503394 is about 405.1488433251.

The spelling of 66503394 in words is "sixty-six million, five hundred three thousand, three hundred ninety-four".