66722240454 has 16 divisors (see below), whose sum is σ = 140467874880. Its totient is φ = 21070181160.

The previous prime is 66722240449. The next prime is 66722240467. The reversal of 66722240454 is 45404222766.

It is a super-2 number, since 2×66722240454² (a number of 22 digits) contains 22 as substring.

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, 292641292 + ... + 292641519.

It is an arithmetic number, because the mean of its divisors is an integer number (8779242180).

Almost surely, 2^66722240454 is an apocalyptic number.

66722240454 is an abundant number, since it is smaller than the sum of its proper divisors (73745634426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66722240454 is a wasteful number, since it uses less digits than its factorization.

66722240454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585282835.

The product of its (nonzero) digits is 645120, while the sum is 42.

The spelling of 66722240454 in words is "sixty-six billion, seven hundred twenty-two million, two hundred forty thousand, four hundred fifty-four".