661269762 has 12 divisors (see below), whose sum is σ = 1432751190. Its totient is φ = 220423248.

The previous prime is 661269761. The next prime is 661269793. The reversal of 661269762 is 267962166.

It can be written as a sum of positive squares in only one way, i.e., 582787881 + 78481881 = 24141^2 + 8859^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (661269761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18368587 + ... + 18368622.

Almost surely, 2^661269762 is an apocalyptic number.

661269762 is an abundant number, since it is smaller than the sum of its proper divisors (771481428).

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

661269762 is a wasteful number, since it uses less digits than its factorization.

661269762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36737217 (or 36737214 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 661269762 is about 25715.1659920756. The cubic root of 661269762 is about 871.2167596262.

The spelling of 661269762 in words is "six hundred sixty-one million, two hundred sixty-nine thousand, seven hundred sixty-two".