51665020152206 has 4 divisors (see below), whose sum is σ = 77497530228312. Its totient is φ = 25832510076102.

The previous prime is 51665020152181. The next prime is 51665020152271. The reversal of 51665020152206 is 60225102056615.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12916255038050 + ... + 12916255038053.

It is an arithmetic number, because the mean of its divisors is an integer number (19374382557078).

Almost surely, 2^{51665020152206} is an apocalyptic number.

51665020152206 is a deficient number, since it is larger than the sum of its proper divisors (25832510076106).

51665020152206 is a wasteful number, since it uses less digits than its factorization.

51665020152206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25832510076105.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 51665020152206 in words is "fifty-one trillion, six hundred sixty-five billion, twenty million, one hundred fifty-two thousand, two hundred six".