660735344266 has 4 divisors (see below), whose sum is σ = 991103016402. Its totient is φ = 330367672132.

The previous prime is 660735344261. The next prime is 660735344309. The reversal of 660735344266 is 662443537066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 662443537066 = 2 ⋅331221768533.

It can be written as a sum of positive squares in only one way, i.e., 567453357025 + 93281987241 = 753295^2 + 305421^2 .

It is not an unprimeable number, because it can be changed into a prime (660735344261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165183836065 + ... + 165183836068.

Almost surely, 2^660735344266 is an apocalyptic number.

660735344266 is a deficient number, since it is larger than the sum of its proper divisors (330367672136).

660735344266 is a wasteful number, since it uses less digits than its factorization.

660735344266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330367672135.

The product of its (nonzero) digits is 13063680, while the sum is 52.

It can be divided in two parts, 660735 and 344266, that added together give a palindrome (1005001).

The spelling of 660735344266 in words is "six hundred sixty billion, seven hundred thirty-five million, three hundred forty-four thousand, two hundred sixty-six".