661053284 has 6 divisors (see below), whose sum is σ = 1156843254. Its totient is φ = 330526640.

The previous prime is 661053257. The next prime is 661053293. The reversal of 661053284 is 482350166.

It can be written as a sum of positive squares in only one way, i.e., 623500900 + 37552384 = 24970^2 + 6128^2 .

It is a super-4 number, since 4×661053284⁴ (a number of 36 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82631657 + ... + 82631664.

It is an arithmetic number, because the mean of its divisors is an integer number (192807209).

Almost surely, 2^661053284 is an apocalyptic number.

It is an amenable number.

661053284 is a deficient number, since it is larger than the sum of its proper divisors (495789970).

661053284 is a wasteful number, since it uses less digits than its factorization.

661053284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165263325 (or 165263323 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 661053284 is about 25710.9564971823. The cubic root of 661053284 is about 871.1216799997.

The spelling of 661053284 in words is "six hundred sixty-one million, fifty-three thousand, two hundred eighty-four".