53690661 has 16 divisors (see below), whose sum is σ = 79854720. Its totient is φ = 35652960.

The previous prime is 53690627. The next prime is 53690753. The reversal of 53690661 is 16609635.

It is not a de Polignac number, because 53690661 - 2⁶ = 53690597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53690621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3321 + ... + 10881.

It is an arithmetic number, because the mean of its divisors is an integer number (4990920).

Almost surely, 2^53690661 is an apocalyptic number.

It is an amenable number.

53690661 is a deficient number, since it is larger than the sum of its proper divisors (26164059).

53690661 is a wasteful number, since it uses less digits than its factorization.

53690661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7833 (or 7827 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 53690661 is about 7327.3911455579. The cubic root of 53690661 is about 377.2531866186.

The spelling of 53690661 in words is "fifty-three million, six hundred ninety thousand, six hundred sixty-one".