68066553 has 4 divisors (see below), whose sum is σ = 90755408. Its totient is φ = 45377700.

The previous prime is 68066543. The next prime is 68066561. The reversal of 68066553 is 35566086.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 68066553 - 2⁶ = 68066489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68066503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11344423 + ... + 11344428.

It is an arithmetic number, because the mean of its divisors is an integer number (22688852).

Almost surely, 2^68066553 is an apocalyptic number.

It is an amenable number.

68066553 is a deficient number, since it is larger than the sum of its proper divisors (22688855).

68066553 is a wasteful number, since it uses less digits than its factorization.

68066553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22688854.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 68066553 is about 8250.2456327069. The cubic root of 68066553 is about 408.2986267693.

The spelling of 68066553 in words is "sixty-eight million, sixty-six thousand, five hundred fifty-three".