66040802 has 8 divisors (see below), whose sum is σ = 99099612. Its totient is φ = 33007600.

The previous prime is 66040787. The next prime is 66040813. The reversal of 66040802 is 20804066.

It can be written as a sum of positive squares in 2 ways, for example, as 52432081 + 13608721 = 7241^2 + 3689^2 .

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

It is a super-2 number, since 2×66040802² = 8722775057606408, which contains 22 as substring.

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, 2552 + ... + 11772.

Almost surely, 2^66040802 is an apocalyptic number.

66040802 is a deficient number, since it is larger than the sum of its proper divisors (33058810).

66040802 is a wasteful number, since it uses less digits than its factorization.

66040802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12804.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 66040802 is about 8126.5492061514. The cubic root of 66040802 is about 404.2072630258.

Adding to 66040802 its reverse (20804066), we get a palindrome (86844868).

The spelling of 66040802 in words is "sixty-six million, forty thousand, eight hundred two".