66398702 has 16 divisors (see below), whose sum is σ = 106112592. Its totient is φ = 31052160.

The previous prime is 66398681. The next prime is 66398729. The reversal of 66398702 is 20789366.

It is a self number, because there is not a number n which added to its sum of digits gives 66398702.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 449 + ... + 11532.

It is an arithmetic number, because the mean of its divisors is an integer number (6632037).

Almost surely, 2^66398702 is an apocalyptic number.

66398702 is a deficient number, since it is larger than the sum of its proper divisors (39713890).

66398702 is a wasteful number, since it uses less digits than its factorization.

66398702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12163.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 66398702 is about 8148.5398692036. The cubic root of 66398702 is about 404.9361317768.

The spelling of 66398702 in words is "sixty-six million, three hundred ninety-eight thousand, seven hundred two".