51667899 has 8 divisors (see below), whose sum is σ = 70356480. Its totient is φ = 33712296.

The previous prime is 51667883. The next prime is 51667901. The reversal of 51667899 is 99876615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51667899 - 2⁴ = 51667883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51660899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183079 + ... + 183360.

It is an arithmetic number, because the mean of its divisors is an integer number (8794560).

Almost surely, 2^51667899 is an apocalyptic number.

51667899 is a deficient number, since it is larger than the sum of its proper divisors (18688581).

51667899 is a wasteful number, since it uses less digits than its factorization.

51667899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366489.

The product of its digits is 816480, while the sum is 51.

The square root of 51667899 is about 7188.0386059063. The cubic root of 51667899 is about 372.4548214805.

The spelling of 51667899 in words is "fifty-one million, six hundred sixty-seven thousand, eight hundred ninety-nine".