266413509664 has 12 divisors (see below), whose sum is σ = 524501597214. Its totient is φ = 133206754816.

The previous prime is 266413509601. The next prime is 266413509667. The reversal of 266413509664 is 466905314662.

It can be written as a sum of positive squares in only one way, i.e., 263674034064 + 2739475600 = 513492^2 + 52340^2 .

It is a super-3 number, since 3×266413509664³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (266413509667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4162711057 + ... + 4162711120.

Almost surely, 2^266413509664 is an apocalyptic number.

It is an amenable number.

266413509664 is a deficient number, since it is larger than the sum of its proper divisors (258088087550).

266413509664 is an equidigital number, since it uses as much as digits as its factorization.

266413509664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8325422187 (or 8325422179 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 52.

The spelling of 266413509664 in words is "two hundred sixty-six billion, four hundred thirteen million, five hundred nine thousand, six hundred sixty-four".