551354661 has 64 divisors (see below), whose sum is σ = 975770880. Its totient is φ = 303264000.

The previous prime is 551354653. The next prime is 551354669. The reversal of 551354661 is 166453155.

551354661 is a `hidden beast` number, since 5 + 51 + 3 + 546 + 61 = 666.

It is an interprime number because it is at equal distance from previous prime (551354653) and next prime (551354669).

It is not a de Polignac number, because 551354661 - 2³ = 551354653 is a prime.

It is a super-4 number, since 4×551354661⁴ (a number of 36 digits) contains 4444 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551354669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 234351 + ... + 236691.

It is an arithmetic number, because the mean of its divisors is an integer number (15246420).

Almost surely, 2^551354661 is an apocalyptic number.

It is an amenable number.

551354661 is a deficient number, since it is larger than the sum of its proper divisors (424416219).

551354661 is a wasteful number, since it uses less digits than its factorization.

551354661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2435 (or 2429 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 551354661 is about 23480.9425066372. The cubic root of 551354661 is about 819.9933873153.

The spelling of 551354661 in words is "five hundred fifty-one million, three hundred fifty-four thousand, six hundred sixty-one".