66873402 has 24 divisors (see below), whose sum is σ = 146880084. Its totient is φ = 21985344.

The previous prime is 66873377. The next prime is 66873431. The reversal of 66873402 is 20437866.

It can be written as a sum of positive squares in 2 ways, for example, as 59305401 + 7568001 = 7701^2 + 2751^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24133 + ... + 26760.

Almost surely, 2^66873402 is an apocalyptic number.

66873402 is an abundant number, since it is smaller than the sum of its proper divisors (80006682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66873402 is a wasteful number, since it uses less digits than its factorization.

66873402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50974 (or 50971 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 66873402 is about 8177.6159117435. The cubic root of 66873402 is about 405.8988358850.

The spelling of 66873402 in words is "sixty-six million, eight hundred seventy-three thousand, four hundred two".