51695066 has 4 divisors (see below), whose sum is σ = 77542602. Its totient is φ = 25847532.

The previous prime is 51695051. The next prime is 51695071. The reversal of 51695066 is 66059615.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 46308025 + 5387041 = 6805^2 + 2321^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12923765 + ... + 12923768.

Almost surely, 2^51695066 is an apocalyptic number.

51695066 is a deficient number, since it is larger than the sum of its proper divisors (25847536).

51695066 is a wasteful number, since it uses less digits than its factorization.

51695066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25847535.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 51695066 is about 7189.9280942162. The cubic root of 51695066 is about 372.5200890026.

The spelling of 51695066 in words is "fifty-one million, six hundred ninety-five thousand, sixty-six".