65944680 has 64 divisors (see below), whose sum is σ = 206444160. Its totient is φ = 16819968.

The previous prime is 65944661. The next prime is 65944691. The reversal of 65944680 is 8644956.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9187 + ... + 14706.

It is an arithmetic number, because the mean of its divisors is an integer number (3225690).

Almost surely, 2^65944680 is an apocalyptic number.

65944680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65944680 is an abundant number, since it is smaller than the sum of its proper divisors (140499480).

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

65944680 is a wasteful number, since it uses less digits than its factorization.

65944680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23930 (or 23926 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 65944680 is about 8120.6329802547. The cubic root of 65944680 is about 404.0110607043.

It can be divided in two parts, 659446 and 80, that added together give a triangular number (659526 = T₁₁₄₈).

The spelling of 65944680 in words is "sixty-five million, nine hundred forty-four thousand, six hundred eighty".