66968291498 has 4 divisors (see below), whose sum is σ = 100452437250. Its totient is φ = 33484145748.

The previous prime is 66968291459. The next prime is 66968291519. The reversal of 66968291498 is 89419286966.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89419286966 = 2 ⋅44709643483.

It can be written as a sum of positive squares in only one way, i.e., 62907160969 + 4061130529 = 250813^2 + 63727^2 .

It is a super-2 number, since 2×66968291498² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16742072873 + ... + 16742072876.

Almost surely, 2^66968291498 is an apocalyptic number.

66968291498 is a deficient number, since it is larger than the sum of its proper divisors (33484145752).

66968291498 is a wasteful number, since it uses less digits than its factorization.

66968291498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33484145751.

The product of its digits is 80621568, while the sum is 68.

The spelling of 66968291498 in words is "sixty-six billion, nine hundred sixty-eight million, two hundred ninety-one thousand, four hundred ninety-eight".