55669951 has 8 divisors (see below), whose sum is σ = 59300640. Its totient is φ = 52078848.

The previous prime is 55669931. The next prime is 55669961. The reversal of 55669951 is 15996655.

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 55669951 - 2⁵ = 55669919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55669921) 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, 6966 + ... + 12643.

It is an arithmetic number, because the mean of its divisors is an integer number (7412580).

Almost surely, 2^55669951 is an apocalyptic number.

55669951 is a deficient number, since it is larger than the sum of its proper divisors (3630689).

55669951 is a wasteful number, since it uses less digits than its factorization.

55669951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19793.

The product of its digits is 364500, while the sum is 46.

The square root of 55669951 is about 7461.2298584081. The cubic root of 55669951 is about 381.8331348177.

It can be divided in two parts, 556 and 69951, that added together give a palindrome (70507).

The spelling of 55669951 in words is "fifty-five million, six hundred sixty-nine thousand, nine hundred fifty-one".