661071262 has 16 divisors (see below), whose sum is σ = 1024918272. Its totient is φ = 319601560.

The previous prime is 661071259. The next prime is 661071317. The reversal of 661071262 is 262170166.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34564 + ... + 50167.

It is an arithmetic number, because the mean of its divisors is an integer number (64057392).

Almost surely, 2^661071262 is an apocalyptic number.

661071262 is a deficient number, since it is larger than the sum of its proper divisors (363847010).

661071262 is a wasteful number, since it uses less digits than its factorization.

661071262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84863.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 661071262 is about 25711.3061122923. The cubic root of 661071262 is about 871.1295769343.

The spelling of 661071262 in words is "six hundred sixty-one million, seventy-one thousand, two hundred sixty-two".