66945722 has 8 divisors (see below), whose sum is σ = 100928916. Its totient is φ = 33302752.

The previous prime is 66945701. The next prime is 66945751. The reversal of 66945722 is 22754966.

It can be written as a sum of positive squares in 2 ways, for example, as 40309801 + 26635921 = 6349^2 + 5161^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 66945722.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84563 + ... + 85350.

Almost surely, 2^66945722 is an apocalyptic number.

66945722 is a deficient number, since it is larger than the sum of its proper divisors (33983194).

66945722 is a wasteful number, since it uses less digits than its factorization.

66945722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170112.

The product of its digits is 181440, while the sum is 41.

The square root of 66945722 is about 8182.0365435508. The cubic root of 66945722 is about 406.0451024497.

The spelling of 66945722 in words is "sixty-six million, nine hundred forty-five thousand, seven hundred twenty-two".