66400910 has 8 divisors (see below), whose sum is σ = 119521656. Its totient is φ = 26560360.

The previous prime is 66400897. The next prime is 66400933. The reversal of 66400910 is 1900466.

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 66400910.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3320036 + ... + 3320055.

It is an arithmetic number, because the mean of its divisors is an integer number (14940207).

Almost surely, 2^66400910 is an apocalyptic number.

66400910 is a deficient number, since it is larger than the sum of its proper divisors (53120746).

66400910 is a wasteful number, since it uses less digits than its factorization.

66400910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6640098.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 66400910 is about 8148.6753524729. The cubic root of 66400910 is about 404.9406202635.

The spelling of 66400910 in words is "sixty-six million, four hundred thousand, nine hundred ten".