66260402 has 8 divisors (see below), whose sum is σ = 107036076. Its totient is φ = 30581712.

The previous prime is 66260399. The next prime is 66260417. The reversal of 66260402 is 20406266.

It can be written as a sum of positive squares in 2 ways, for example, as 61011721 + 5248681 = 7811^2 + 2291^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 2548477 = 66260402 / (6 + 6 + 2 + 6 + 0 + 4 + 0 + 2).

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, 1274213 + ... + 1274264.

Almost surely, 2^66260402 is an apocalyptic number.

66260402 is a deficient number, since it is larger than the sum of its proper divisors (40775674).

66260402 is a wasteful number, since it uses less digits than its factorization.

66260402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2548492.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 66260402 is about 8140.0492627502. The cubic root of 66260402 is about 404.6547929729.

Adding to 66260402 its reverse (20406266), we get a palindrome (86666668).

The spelling of 66260402 in words is "sixty-six million, two hundred sixty thousand, four hundred two".