66272402 has 40 divisors (see below), whose sum is σ = 119423436. Its totient is φ = 27560736.

The previous prime is 66272383. The next prime is 66272461. The reversal of 66272402 is 20427266.

It can be written as a sum of positive squares in 2 ways, for example, as 62236321 + 4036081 = 7889^2 + 2009^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 177488 + ... + 177860.

Almost surely, 2^66272402 is an apocalyptic number.

66272402 is a deficient number, since it is larger than the sum of its proper divisors (53151034).

66272402 is an equidigital number, since it uses as much as digits as its factorization.

66272402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 66272402 is about 8140.7863256568. The cubic root of 66272402 is about 404.6792196504.

Adding to 66272402 its reverse (20427266), we get a palindrome (86699668).

The spelling of 66272402 in words is "sixty-six million, two hundred seventy-two thousand, four hundred two".