66822628 has 6 divisors (see below), whose sum is σ = 116939606. Its totient is φ = 33411312.

The previous prime is 66822617. The next prime is 66822689. The reversal of 66822628 is 82622866.

It can be written as a sum of positive squares in only one way, i.e., 59105344 + 7717284 = 7688^2 + 2778^2 .

It is a super-2 number, since 2×66822628² = 8930527225652768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8352825 + ... + 8352832.

Almost surely, 2^66822628 is an apocalyptic number.

It is an amenable number.

66822628 is a deficient number, since it is larger than the sum of its proper divisors (50116978).

66822628 is a wasteful number, since it uses less digits than its factorization.

66822628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16705661 (or 16705659 counting only the distinct ones).

The product of its digits is 110592, while the sum is 40.

The square root of 66822628 is about 8174.5108722174. The cubic root of 66822628 is about 405.7960828973.

The spelling of 66822628 in words is "sixty-six million, eight hundred twenty-two thousand, six hundred twenty-eight".