68479666 has 4 divisors (see below), whose sum is σ = 102719502. Its totient is φ = 34239832.

The previous prime is 68479613. The next prime is 68479669. The reversal of 68479666 is 66697486.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 68409441 + 70225 = 8271^2 + 265^2 .

It is not an unprimeable number, because it can be changed into a prime (68479669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17119915 + ... + 17119918.

Almost surely, 2^68479666 is an apocalyptic number.

68479666 is a deficient number, since it is larger than the sum of its proper divisors (34239836).

68479666 is a wasteful number, since it uses less digits than its factorization.

68479666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34239835.

The product of its digits is 2612736, while the sum is 52.

The square root of 68479666 is about 8275.2441655821. The cubic root of 68479666 is about 409.1229835622.

The spelling of 68479666 in words is "sixty-eight million, four hundred seventy-nine thousand, six hundred sixty-six".