66464666 has 16 divisors (see below), whose sum is σ = 101842920. Its totient is φ = 32524800.

The previous prime is 66464639. The next prime is 66464677. The reversal of 66464666 is 66646466.

It can be written as a sum of positive squares in 4 ways, for example, as 50822641 + 15642025 = 7129^2 + 3955^2 .

It is a super-3 number, since 3×66464666³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16130 + ... + 19826.

Almost surely, 2^66464666 is an apocalyptic number.

66464666 is a deficient number, since it is larger than the sum of its proper divisors (35378254).

66464666 is a wasteful number, since it uses less digits than its factorization.

66464666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3889.

The product of its digits is 746496, while the sum is 44.

The square root of 66464666 is about 8152.5864607497. The cubic root of 66464666 is about 405.0701824215.

The spelling of 66464666 in words is "sixty-six million, four hundred sixty-four thousand, six hundred sixty-six".