65610166651 has 4 divisors (see below), whose sum is σ = 65625532704. Its totient is φ = 65594800600.

The previous prime is 65610166649. The next prime is 65610166663. The reversal of 65610166651 is 15666101656.

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

It is a cyclic number.

It is not a de Polignac number, because 65610166651 - 2¹ = 65610166649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65610166598 and 65610166607.

It is not an unprimeable number, because it can be changed into a prime (65610166151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7676620 + ... + 7685161.

It is an arithmetic number, because the mean of its divisors is an integer number (16406383176).

Almost surely, 2^65610166651 is an apocalyptic number.

65610166651 is a deficient number, since it is larger than the sum of its proper divisors (15366053).

65610166651 is a wasteful number, since it uses less digits than its factorization.

65610166651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15366052.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 65610166651 in words is "sixty-five billion, six hundred ten million, one hundred sixty-six thousand, six hundred fifty-one".