51677669 has 4 divisors (see below), whose sum is σ = 51826944. Its totient is φ = 51528396.

The previous prime is 51677653. The next prime is 51677699. The reversal of 51677669 is 96677615.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51677669 - 2⁴ = 51677653 is a prime.

It is a super-2 number, since 2×51677669² = 5341162946547122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51677629) 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, 74117 + ... + 74810.

It is an arithmetic number, because the mean of its divisors is an integer number (12956736).

Almost surely, 2^51677669 is an apocalyptic number.

It is an amenable number.

51677669 is a deficient number, since it is larger than the sum of its proper divisors (149275).

51677669 is a wasteful number, since it uses less digits than its factorization.

51677669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149274.

The product of its digits is 476280, while the sum is 47.

The square root of 51677669 is about 7188.7181750295. The cubic root of 51677669 is about 372.4782961094.

The spelling of 51677669 in words is "fifty-one million, six hundred seventy-seven thousand, six hundred sixty-nine".