64400966 has 16 divisors (see below), whose sum is σ = 115202304. Its totient is φ = 26400264.

The previous prime is 64400957. The next prime is 64400969. The reversal of 64400966 is 66900446.

64400966 is a modest number, since divided by 966 gives 644 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64400969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99680 + ... + 100323.

It is an arithmetic number, because the mean of its divisors is an integer number (7200144).

Almost surely, 2^64400966 is an apocalyptic number.

64400966 is a deficient number, since it is larger than the sum of its proper divisors (50801338).

64400966 is a wasteful number, since it uses less digits than its factorization.

64400966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200035.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 64400966 is about 8025.0212460778. The cubic root of 64400966 is about 400.8336073734.

The spelling of 64400966 in words is "sixty-four million, four hundred thousand, nine hundred sixty-six".