51379966 has 16 divisors (see below), whose sum is σ = 84213360. Its totient is φ = 23316480.

The previous prime is 51379957. The next prime is 51379997. The reversal of 51379966 is 66997315.

It is a super-2 number, since 2×51379966² = 5279801812322312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15400 + ... + 18436.

It is an arithmetic number, because the mean of its divisors is an integer number (5263335).

Almost surely, 2^51379966 is an apocalyptic number.

51379966 is a deficient number, since it is larger than the sum of its proper divisors (32833394).

51379966 is a wasteful number, since it uses less digits than its factorization.

51379966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3819.

The product of its digits is 306180, while the sum is 46.

The square root of 51379966 is about 7167.9820033256. The cubic root of 51379966 is about 371.7616646929.

The spelling of 51379966 in words is "fifty-one million, three hundred seventy-nine thousand, nine hundred sixty-six".