661343262 has 8 divisors (see below), whose sum is σ = 1322686536. Its totient is φ = 220447752.

The previous prime is 661343261. The next prime is 661343297. The reversal of 661343262 is 262343166.

It is a sphenic number, since it is the product of 3 distinct primes.

661343262 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661343261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55111933 + ... + 55111944.

It is an arithmetic number, because the mean of its divisors is an integer number (165335817).

Almost surely, 2^661343262 is an apocalyptic number.

661343262 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

661343262 is a wasteful number, since it uses less digits than its factorization.

661343262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110223882.

The product of its digits is 31104, while the sum is 33.

The square root of 661343262 is about 25716.5950701099. The cubic root of 661343262 is about 871.2490369524.

It can be divided in two parts, 66134 and 3262, that added together give a palindrome (69396).

The spelling of 661343262 in words is "six hundred sixty-one million, three hundred forty-three thousand, two hundred sixty-two".