53997766 has 16 divisors (see below), whose sum is σ = 83747664. Its totient is φ = 26095104.

The previous prime is 53997761. The next prime is 53997773. The reversal of 53997766 is 66779935.

It is a super-3 number, since 3×53997766³ (a number of 24 digits) contains 333 as substring.

Its product of digits (2143260) is a multiple of the sum of its prime divisors (6615).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53997761) 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, 5106 + ... + 11578.

It is an arithmetic number, because the mean of its divisors is an integer number (5234229).

Almost surely, 2^53997766 is an apocalyptic number.

53997766 is a deficient number, since it is larger than the sum of its proper divisors (29749898).

53997766 is a wasteful number, since it uses less digits than its factorization.

53997766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6615.

The product of its digits is 2143260, while the sum is 52.

The square root of 53997766 is about 7348.3172223306. The cubic root of 53997766 is about 377.9711025565.

The spelling of 53997766 in words is "fifty-three million, nine hundred ninety-seven thousand, seven hundred sixty-six".