614640664 has 32 divisors (see below), whose sum is σ = 1258467840. Its totient is φ = 279104800.

The previous prime is 614640643. The next prime is 614640673. The reversal of 614640664 is 466046416.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104769 + ... + 110479.

It is an arithmetic number, because the mean of its divisors is an integer number (39327120).

Almost surely, 2^614640664 is an apocalyptic number.

It is an amenable number.

614640664 is an abundant number, since it is smaller than the sum of its proper divisors (643827176).

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

614640664 is a wasteful number, since it uses less digits than its factorization.

614640664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6951 (or 6947 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 614640664 is about 24791.9475636748. The cubic root of 614640664 is about 850.2378407094.

It can be divided in two parts, 614 and 640664, that added together give a triangular number (641278 = T₁₁₃₂).

The spelling of 614640664 in words is "six hundred fourteen million, six hundred forty thousand, six hundred sixty-four".