6466916047 has 4 divisors (see below), whose sum is σ = 6470105320. Its totient is φ = 6463726776.

The previous prime is 6466916039. The next prime is 6466916051. The reversal of 6466916047 is 7406196646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7406196646 = 2 ⋅3703098323.

It is a cyclic number.

It is not a de Polignac number, because 6466916047 - 2³ = 6466916039 is a prime.

It is a super-2 number, since 2×6466916047² = 83642006317892212418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6466916077) 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, 1591593 + ... + 1595650.

It is an arithmetic number, because the mean of its divisors is an integer number (1617526330).

Almost surely, 2^6466916047 is an apocalyptic number.

6466916047 is a deficient number, since it is larger than the sum of its proper divisors (3189273).

6466916047 is a wasteful number, since it uses less digits than its factorization.

6466916047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3189272.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The square root of 6466916047 is about 80417.1377692591. The cubic root of 6466916047 is about 1863.0838777303.

The spelling of 6466916047 in words is "six billion, four hundred sixty-six million, nine hundred sixteen thousand, forty-seven".