661522252 has 6 divisors (see below), whose sum is σ = 1157663948. Its totient is φ = 330761124.

The previous prime is 661522243. The next prime is 661522261. The reversal of 661522252 is 252225166.

It is a happy number.

661522252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (661522243) and next prime (661522261).

It is a super-3 number, since 3×661522252³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82690278 + ... + 82690285.

Almost surely, 2^661522252 is an apocalyptic number.

It is an amenable number.

661522252 is a deficient number, since it is larger than the sum of its proper divisors (496141696).

661522252 is a wasteful number, since it uses less digits than its factorization.

661522252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165380567 (or 165380565 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 661522252 is about 25720.0748832502. The cubic root of 661522252 is about 871.3276299250.

The spelling of 661522252 in words is "six hundred sixty-one million, five hundred twenty-two thousand, two hundred fifty-two".