66802490 has 8 divisors (see below), whose sum is σ = 120244500. Its totient is φ = 26720992.

The previous prime is 66802487. The next prime is 66802493. The reversal of 66802490 is 9420866.

It is an interprime number because it is at equal distance from previous prime (66802487) and next prime (66802493).

It can be written as a sum of positive squares in 2 ways, for example, as 66765241 + 37249 = 8171^2 + 193^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66802490.

It is not an unprimeable number, because it can be changed into a prime (66802493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3340115 + ... + 3340134.

Almost surely, 2^66802490 is an apocalyptic number.

66802490 is a deficient number, since it is larger than the sum of its proper divisors (53442010).

66802490 is a wasteful number, since it uses less digits than its factorization.

66802490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6680256.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 66802490 is about 8173.2790237456. The cubic root of 66802490 is about 405.7553145587.

The spelling of 66802490 in words is "sixty-six million, eight hundred two thousand, four hundred ninety".