66464910 has 24 divisors (see below), whose sum is σ = 172809000. Its totient is φ = 17723952.

The previous prime is 66464903. The next prime is 66464939. The reversal of 66464910 is 1946466.

66464910 is a `hidden beast` number, since 6 + 6 + 4 + 649 + 1 + 0 = 666.

It is a super-2 number, since 2×66464910² = 8835168522616200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 369160 + ... + 369339.

It is an arithmetic number, because the mean of its divisors is an integer number (7200375).

Almost surely, 2^66464910 is an apocalyptic number.

66464910 is an abundant number, since it is smaller than the sum of its proper divisors (106344090).

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

66464910 is a wasteful number, since it uses less digits than its factorization.

66464910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738512 (or 738509 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 66464910 is about 8152.6014253120. The cubic root of 66464910 is about 405.0706781085.

The spelling of 66464910 in words is "sixty-six million, four hundred sixty-four thousand, nine hundred ten".