66950451 has 6 divisors (see below), whose sum is σ = 96706220. Its totient is φ = 44633628.

The previous prime is 66950449. The next prime is 66950459. The reversal of 66950451 is 15405966.

It is not a de Polignac number, because 66950451 - 2¹ = 66950449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66950459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3719461 + ... + 3719478.

Almost surely, 2^66950451 is an apocalyptic number.

66950451 is a deficient number, since it is larger than the sum of its proper divisors (29755769).

66950451 is a wasteful number, since it uses less digits than its factorization.

66950451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7438945 (or 7438942 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 66950451 is about 8182.3255251793. The cubic root of 66950451 is about 406.0546631407.

The spelling of 66950451 in words is "sixty-six million, nine hundred fifty thousand, four hundred fifty-one".