55669851 has 6 divisors (see below), whose sum is σ = 80412020. Its totient is φ = 37113228.

The previous prime is 55669847. The next prime is 55669871. The reversal of 55669851 is 15896655.

It is a happy number.

55669851 is a `hidden beast` number, since 5 + 566 + 9 + 85 + 1 = 666.

It is not a de Polignac number, because 55669851 - 2² = 55669847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55669797 and 55669806.

It is not an unprimeable number, because it can be changed into a prime (55669811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3092761 + ... + 3092778.

Almost surely, 2^55669851 is an apocalyptic number.

55669851 is a deficient number, since it is larger than the sum of its proper divisors (24742169).

55669851 is a wasteful number, since it uses less digits than its factorization.

55669851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6185545 (or 6185542 counting only the distinct ones).

The product of its digits is 324000, while the sum is 45.

The square root of 55669851 is about 7461.2231570970. The cubic root of 55669851 is about 381.8329061885.

It can be divided in two parts, 556 and 69851, that added together give a palindrome (70407).

The spelling of 55669851 in words is "fifty-five million, six hundred sixty-nine thousand, eight hundred fifty-one".