66722050 has 12 divisors (see below), whose sum is σ = 124103106. Its totient is φ = 26688800.

The previous prime is 66722041. The next prime is 66722077. The reversal of 66722050 is 5022766.

It can be written as a sum of positive squares in 3 ways, for example, as 53392249 + 13329801 = 7307^2 + 3651^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 667171 + ... + 667270.

Almost surely, 2^66722050 is an apocalyptic number.

66722050 is a deficient number, since it is larger than the sum of its proper divisors (57381056).

66722050 is a wasteful number, since it uses less digits than its factorization.

66722050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334453 (or 1334448 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 66722050 is about 8168.3566278659. The cubic root of 66722050 is about 405.5923861660.

The spelling of 66722050 in words is "sixty-six million, seven hundred twenty-two thousand, fifty".