661233053 has 8 divisors (see below), whose sum is σ = 712298496. Its totient is φ = 610196400.

The previous prime is 661233047. The next prime is 661233101. The reversal of 661233053 is 350332166.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 661233053 - 2²² = 657038749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661236053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77468 + ... + 85578.

It is an arithmetic number, because the mean of its divisors is an integer number (89037312).

Almost surely, 2^661233053 is an apocalyptic number.

It is an amenable number.

661233053 is a deficient number, since it is larger than the sum of its proper divisors (51065443).

661233053 is a wasteful number, since it uses less digits than its factorization.

661233053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14395.

The product of its (nonzero) digits is 9720, while the sum is 29.

The square root of 661233053 is about 25714.4522204927. The cubic root of 661233053 is about 871.2006380725.

The spelling of 661233053 in words is "six hundred sixty-one million, two hundred thirty-three thousand, fifty-three".