66416245268 has 6 divisors (see below), whose sum is σ = 116228429226. Its totient is φ = 33208122632.

The previous prime is 66416245243. The next prime is 66416245271. The reversal of 66416245268 is 86254261466.

It can be written as a sum of positive squares in only one way, i.e., 60975412624 + 5440832644 = 246932^2 + 73762^2 .

It is a super-2 number, since 2×66416245268² (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 as a sum of consecutive naturals, namely, 8302030655 + ... + 8302030662.

It is an arithmetic number, because the mean of its divisors is an integer number (19371404871).

Almost surely, 2^66416245268 is an apocalyptic number.

It is an amenable number.

66416245268 is a deficient number, since it is larger than the sum of its proper divisors (49812183958).

66416245268 is a wasteful number, since it uses less digits than its factorization.

66416245268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16604061321 (or 16604061319 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 50.

The spelling of 66416245268 in words is "sixty-six billion, four hundred sixteen million, two hundred forty-five thousand, two hundred sixty-eight".