53779661 has 8 divisors (see below), whose sum is σ = 57973944. Its totient is φ = 49593600.

The previous prime is 53779657. The next prime is 53779667. The reversal of 53779661 is 16697735.

It can be written as a sum of positive squares in 4 ways, for example, as 36100 + 53743561 = 190^2 + 7331^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 53779661 - 2² = 53779657 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53779667) 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, 22265 + ... + 24561.

It is an arithmetic number, because the mean of its divisors is an integer number (7246743).

Almost surely, 2^53779661 is an apocalyptic number.

It is an amenable number.

53779661 is a deficient number, since it is larger than the sum of its proper divisors (4194283).

53779661 is a wasteful number, since it uses less digits than its factorization.

53779661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4111.

The product of its digits is 238140, while the sum is 44.

The square root of 53779661 is about 7333.4617337244. The cubic root of 53779661 is about 377.4615220346.

The spelling of 53779661 in words is "fifty-three million, seven hundred seventy-nine thousand, six hundred sixty-one".