1650666666007 has 4 divisors (see below), whose sum is σ = 1650679562560. Its totient is φ = 1650653769456.

The previous prime is 1650666665987. The next prime is 1650666666041. The reversal of 1650666666007 is 7006666660561.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1650666666007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1650666666307) 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, 6254343 + ... + 6512920.

It is an arithmetic number, because the mean of its divisors is an integer number (412669890640).

Almost surely, 2^{1650666666007} is an apocalyptic number.

1650666666007 is a deficient number, since it is larger than the sum of its proper divisors (12896553).

1650666666007 is a wasteful number, since it uses less digits than its factorization.

1650666666007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12896552.

The product of its (nonzero) digits is 9797760, while the sum is 55.

The spelling of 1650666666007 in words is "one trillion, six hundred fifty billion, six hundred sixty-six million, six hundred sixty-six thousand, seven".