55661402 has 8 divisors (see below), whose sum is σ = 84861012. Its totient is φ = 27374400.

The previous prime is 55661387. The next prime is 55661423. The reversal of 55661402 is 20416655.

55661402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 38925121 + 16736281 = 6239^2 + 4091^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227999 + ... + 228242.

Almost surely, 2^55661402 is an apocalyptic number.

55661402 is a deficient number, since it is larger than the sum of its proper divisors (29199610).

55661402 is a wasteful number, since it uses less digits than its factorization.

55661402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456304.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 55661402 is about 7460.6569415836. The cubic root of 55661402 is about 381.8135883148.

The spelling of 55661402 in words is "fifty-five million, six hundred sixty-one thousand, four hundred two".