66672628 has 24 divisors (see below), whose sum is σ = 127812384. Its totient is φ = 30180000.

The previous prime is 66672559. The next prime is 66672677. The reversal of 66672628 is 82627666.

It is a congruent number.

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, 8026 + ... + 14062.

It is an arithmetic number, because the mean of its divisors is an integer number (5325516).

Almost surely, 2^66672628 is an apocalyptic number.

It is an amenable number.

66672628 is a deficient number, since it is larger than the sum of its proper divisors (61139756).

66672628 is a wasteful number, since it uses less digits than its factorization.

66672628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6303 (or 6301 counting only the distinct ones).

The product of its digits is 290304, while the sum is 43.

The square root of 66672628 is about 8165.3308567381. The cubic root of 66672628 is about 405.4922186892.

The spelling of 66672628 in words is "sixty-six million, six hundred seventy-two thousand, six hundred twenty-eight".