66702818 has 48 divisors (see below), whose sum is σ = 128500344. Its totient is φ = 25724160.

The previous prime is 66702799. The next prime is 66702833. The reversal of 66702818 is 81820766.

It can be written as a sum of positive squares in 4 ways, for example, as 33028009 + 33674809 = 5747^2 + 5803^2 .

It is a super-2 number, since 2×66702818² = 8898531858282248, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 51596 + ... + 52872.

Almost surely, 2^66702818 is an apocalyptic number.

66702818 is a deficient number, since it is larger than the sum of its proper divisors (61797526).

66702818 is a wasteful number, since it uses less digits than its factorization.

66702818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347 (or 1340 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 66702818 is about 8167.1793172429. The cubic root of 66702818 is about 405.5534130312.

The spelling of 66702818 in words is "sixty-six million, seven hundred two thousand, eight hundred eighteen".