68066554 has 4 divisors (see below), whose sum is σ = 102099834. Its totient is φ = 34033276.

The previous prime is 68066543. The next prime is 68066561. The reversal of 68066554 is 45566086.

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., 61701025 + 6365529 = 7855^2 + 2523^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17016637 + ... + 17016640.

Almost surely, 2^68066554 is an apocalyptic number.

68066554 is a deficient number, since it is larger than the sum of its proper divisors (34033280).

68066554 is a wasteful number, since it uses less digits than its factorization.

68066554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34033279.

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 68066554 is about 8250.2456933112. The cubic root of 68066554 is about 408.2986287688.

The spelling of 68066554 in words is "sixty-eight million, sixty-six thousand, five hundred fifty-four".