662720257266 has 16 divisors (see below), whose sum is σ = 1325496321504. Its totient is φ = 220897451264.

The previous prime is 662720257261. The next prime is 662720257271. The reversal of 662720257266 is 662752027266.

662720257266 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (662720257261) and next prime (662720257271).

It is not an unprimeable number, because it can be changed into a prime (662720257261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2170116 + ... + 2456591.

It is an arithmetic number, because the mean of its divisors is an integer number (82843520094).

Almost surely, 2^662720257266 is an apocalyptic number.

662720257266 is an abundant number, since it is smaller than the sum of its proper divisors (662776064238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

662720257266 is a wasteful number, since it uses less digits than its factorization.

662720257266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4650585.

The product of its (nonzero) digits is 5080320, while the sum is 51.

The spelling of 662720257266 in words is "six hundred sixty-two billion, seven hundred twenty million, two hundred fifty-seven thousand, two hundred sixty-six".