51669377 has 4 divisors (see below), whose sum is σ = 51683796. Its totient is φ = 51654960.

The previous prime is 51669367. The next prime is 51669383. The reversal of 51669377 is 77396615.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 45914176 + 5755201 = 6776^2 + 2399^2 .

It is a cyclic number.

It is not a de Polignac number, because 51669377 - 2⁶ = 51669313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51669367) 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, 2783 + ... + 10539.

It is an arithmetic number, because the mean of its divisors is an integer number (12920949).

Almost surely, 2^51669377 is an apocalyptic number.

It is an amenable number.

51669377 is a deficient number, since it is larger than the sum of its proper divisors (14419).

51669377 is an equidigital number, since it uses as much as digits as its factorization.

51669377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14418.

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

The square root of 51669377 is about 7188.1414148582. The cubic root of 51669377 is about 372.4583728989.

The spelling of 51669377 in words is "fifty-one million, six hundred sixty-nine thousand, three hundred seventy-seven".