553121966 has 4 divisors (see below), whose sum is σ = 829682952. Its totient is φ = 276560982.

The previous prime is 553121951. The next prime is 553121969. The reversal of 553121966 is 669121355.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (553121969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138280490 + ... + 138280493.

It is an arithmetic number, because the mean of its divisors is an integer number (207420738).

Almost surely, 2^553121966 is an apocalyptic number.

553121966 is a deficient number, since it is larger than the sum of its proper divisors (276560986).

553121966 is a wasteful number, since it uses less digits than its factorization.

553121966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276560985.

The product of its digits is 48600, while the sum is 38.

The square root of 553121966 is about 23518.5451505828. The cubic root of 553121966 is about 820.8685848815.

The spelling of 553121966 in words is "five hundred fifty-three million, one hundred twenty-one thousand, nine hundred sixty-six".