66889319458 has 8 divisors (see below), whose sum is σ = 108051977628. Its totient is φ = 30871993584.

The previous prime is 66889319437. The next prime is 66889319479. The reversal of 66889319458 is 85491398866.

It is an interprime number because it is at equal distance from previous prime (66889319437) and next prime (66889319479).

It can be written as a sum of positive squares in 2 ways, for example, as 57858048369 + 9031271089 = 240537^2 + 95033^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 66889319393 and 66889319402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1286333041 + ... + 1286333092.

Almost surely, 2^66889319458 is an apocalyptic number.

66889319458 is a deficient number, since it is larger than the sum of its proper divisors (41162658170).

66889319458 is a wasteful number, since it uses less digits than its factorization.

66889319458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572666148.

The product of its digits is 89579520, while the sum is 67.

The spelling of 66889319458 in words is "sixty-six billion, eight hundred eighty-nine million, three hundred nineteen thousand, four hundred fifty-eight".