55393966 has 4 divisors (see below), whose sum is σ = 83090952. Its totient is φ = 27696982.

The previous prime is 55393963. The next prime is 55393969. The reversal of 55393966 is 66939355.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (55393963) and next prime (55393969).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55393963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13848490 + ... + 13848493.

It is an arithmetic number, because the mean of its divisors is an integer number (20772738).

Almost surely, 2^55393966 is an apocalyptic number.

55393966 is a deficient number, since it is larger than the sum of its proper divisors (27696986).

55393966 is a wasteful number, since it uses less digits than its factorization.

55393966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27696985.

The product of its digits is 656100, while the sum is 46.

The square root of 55393966 is about 7442.7122744333. The cubic root of 55393966 is about 381.2011071942.

The spelling of 55393966 in words is "fifty-five million, three hundred ninety-three thousand, nine hundred sixty-six".