266443514642 has 4 divisors (see below), whose sum is σ = 399665271966. Its totient is φ = 133221757320.

The previous prime is 266443514621. The next prime is 266443514693. The reversal of 266443514642 is 246415344662.

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., 266100190801 + 343323841 = 515849^2 + 18529^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66610878659 + ... + 66610878662.

Almost surely, 2^266443514642 is an apocalyptic number.

266443514642 is a deficient number, since it is larger than the sum of its proper divisors (133221757324).

266443514642 is a wasteful number, since it uses less digits than its factorization.

266443514642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133221757323.

The product of its digits is 3317760, while the sum is 47.

The spelling of 266443514642 in words is "two hundred sixty-six billion, four hundred forty-three million, five hundred fourteen thousand, six hundred forty-two".