51666892 has 6 divisors (see below), whose sum is σ = 90417068. Its totient is φ = 25833444.

The previous prime is 51666889. The next prime is 51666899. The reversal of 51666892 is 29866615.

It is not an unprimeable number, because it can be changed into a prime (51666899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6458358 + ... + 6458365.

Almost surely, 2^51666892 is an apocalyptic number.

It is an amenable number.

51666892 is a deficient number, since it is larger than the sum of its proper divisors (38750176).

51666892 is a wasteful number, since it uses less digits than its factorization.

51666892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12916727 (or 12916725 counting only the distinct ones).

The product of its digits is 155520, while the sum is 43.

The square root of 51666892 is about 7187.9685586402. The cubic root of 51666892 is about 372.4524017676.

The spelling of 51666892 in words is "fifty-one million, six hundred sixty-six thousand, eight hundred ninety-two".