66679450 has 24 divisors (see below), whose sum is σ = 128027520. Its totient is φ = 25810800.

The previous prime is 66679447. The next prime is 66679463. The reversal of 66679450 is 5497666.

It is a super-2 number, since 2×66679450² = 8892298104605000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66679397 and 66679406.

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, 19960 + ... + 23059.

It is an arithmetic number, because the mean of its divisors is an integer number (5334480).

Almost surely, 2^66679450 is an apocalyptic number.

66679450 is a deficient number, since it is larger than the sum of its proper divisors (61348070).

66679450 is a wasteful number, since it uses less digits than its factorization.

66679450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43062 (or 43057 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 66679450 is about 8165.7485878516. The cubic root of 66679450 is about 405.5060483204.

The spelling of 66679450 in words is "sixty-six million, six hundred seventy-nine thousand, four hundred fifty".