55791766 has 8 divisors (see below), whose sum is σ = 86573520. Its totient is φ = 26933928.

The previous prime is 55791761. The next prime is 55791811. The reversal of 55791766 is 66719755.

It is a happy number.

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

It is a super-2 number, since 2×55791766² = 6225442306797512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55791761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480906 + ... + 481021.

It is an arithmetic number, because the mean of its divisors is an integer number (10821690).

Almost surely, 2^55791766 is an apocalyptic number.

55791766 is a deficient number, since it is larger than the sum of its proper divisors (30781754).

55791766 is a wasteful number, since it uses less digits than its factorization.

55791766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961958.

The product of its digits is 396900, while the sum is 46.

The square root of 55791766 is about 7469.3885961302. The cubic root of 55791766 is about 382.1114364726. Note that the first 3 decimals are identical.

The spelling of 55791766 in words is "fifty-five million, seven hundred ninety-one thousand, seven hundred sixty-six".