66868622062426 has 4 divisors (see below), whose sum is σ = 100302933093642. Its totient is φ = 33434311031212.

The previous prime is 66868622062409. The next prime is 66868622062453. The reversal of 66868622062426 is 62426022686866.

It is a happy number.

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., 64449667083025 + 2418954979401 = 8028055^2 + 1555299^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16717155515605 + ... + 16717155515608.

Almost surely, 2^{66868622062426} is an apocalyptic number.

66868622062426 is a deficient number, since it is larger than the sum of its proper divisors (33434311031216).

66868622062426 is a wasteful number, since it uses less digits than its factorization.

66868622062426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33434311031215.

The product of its (nonzero) digits is 191102976, while the sum is 64.

The spelling of 66868622062426 in words is "sixty-six trillion, eight hundred sixty-eight billion, six hundred twenty-two million, sixty-two thousand, four hundred twenty-six".