66870744 has 16 divisors (see below), whose sum is σ = 167176920. Its totient is φ = 22290240.

The previous prime is 66870731. The next prime is 66870761. The reversal of 66870744 is 44707866.

It is a super-2 number, since 2×66870744² = 8943392806227072, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66870696 and 66870705.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1393117 + ... + 1393164.

Almost surely, 2^66870744 is an apocalyptic number.

It is an amenable number.

66870744 is an abundant number, since it is smaller than the sum of its proper divisors (100306176).

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

66870744 is a wasteful number, since it uses less digits than its factorization.

66870744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2786290 (or 2786286 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 42.

The square root of 66870744 is about 8177.4533933248. The cubic root of 66870744 is about 405.8934580947.

The spelling of 66870744 in words is "sixty-six million, eight hundred seventy thousand, seven hundred forty-four".