66402470 has 16 divisors (see below), whose sum is σ = 119700720. Its totient is φ = 26521824.

The previous prime is 66402463. The next prime is 66402491. The reversal of 66402470 is 7420466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2801 + ... + 11859.

It is an arithmetic number, because the mean of its divisors is an integer number (7481295).

Almost surely, 2^66402470 is an apocalyptic number.

66402470 is a deficient number, since it is larger than the sum of its proper divisors (53298250).

66402470 is a wasteful number, since it uses less digits than its factorization.

66402470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9799.

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

The square root of 66402470 is about 8148.7710729901. The cubic root of 66402470 is about 404.9437914170.

The spelling of 66402470 in words is "sixty-six million, four hundred two thousand, four hundred seventy".