661177962 has 24 divisors (see below), whose sum is σ = 1442045280. Its totient is φ = 218932200.

The previous prime is 661177961. The next prime is 661177969. The reversal of 661177962 is 269771166.

It is a happy number.

661177962 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (661177961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118912 + ... + 124347.

It is an arithmetic number, because the mean of its divisors is an integer number (60085220).

Almost surely, 2^661177962 is an apocalyptic number.

661177962 is an abundant number, since it is smaller than the sum of its proper divisors (780867318).

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

661177962 is a wasteful number, since it uses less digits than its factorization.

661177962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243418 (or 243415 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 661177962 is about 25713.3809912271. The cubic root of 661177962 is about 871.1764425451.

The spelling of 661177962 in words is "six hundred sixty-one million, one hundred seventy-seven thousand, nine hundred sixty-two".