661956302 has 16 divisors (see below), whose sum is σ = 1201534560. Its totient is φ = 267007488.

The previous prime is 661956271. The next prime is 661956391. The reversal of 661956302 is 203659166.

It is a super-2 number, since 2×661956302² = 876372291515030408, which contains 22 as substring.

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, 1390427 + ... + 1390902.

It is an arithmetic number, because the mean of its divisors is an integer number (75095910).

Almost surely, 2^661956302 is an apocalyptic number.

661956302 is a deficient number, since it is larger than the sum of its proper divisors (539578258).

661956302 is a wasteful number, since it uses less digits than its factorization.

661956302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2781355.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 661956302 is about 25728.5114610232. The cubic root of 661956302 is about 871.5181586990.

The spelling of 661956302 in words is "six hundred sixty-one million, nine hundred fifty-six thousand, three hundred two".