66023722 has 4 divisors (see below), whose sum is σ = 99035586. Its totient is φ = 33011860.

The previous prime is 66023719. The next prime is 66023747. The reversal of 66023722 is 22732066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 64144081 + 1879641 = 8009^2 + 1371^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16505929 + ... + 16505932.

Almost surely, 2^66023722 is an apocalyptic number.

66023722 is a deficient number, since it is larger than the sum of its proper divisors (33011864).

66023722 is a wasteful number, since it uses less digits than its factorization.

66023722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33011863.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 66023722 is about 8125.4982616453. The cubic root of 66023722 is about 404.1724135837.

Adding to 66023722 its reverse (22732066), we get a palindrome (88755788).

The spelling of 66023722 in words is "sixty-six million, twenty-three thousand, seven hundred twenty-two".