6446979077 has 32 divisors (see below), whose sum is σ = 8350408704. Its totient is φ = 4830321600.

The previous prime is 6446979059. The next prime is 6446979109. The reversal of 6446979077 is 7709796446.

It is a cyclic number.

It is not a de Polignac number, because 6446979077 - 2¹² = 6446974981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6446979577) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 366158 + ... + 383360.

It is an arithmetic number, because the mean of its divisors is an integer number (260950272).

Almost surely, 2^6446979077 is an apocalyptic number.

It is an amenable number.

6446979077 is a deficient number, since it is larger than the sum of its proper divisors (1903429627).

6446979077 is a wasteful number, since it uses less digits than its factorization.

6446979077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17409.

The product of its (nonzero) digits is 16003008, while the sum is 59.

The square root of 6446979077 is about 80293.0823732655. The cubic root of 6446979077 is about 1861.1673287650.

The spelling of 6446979077 in words is "six billion, four hundred forty-six million, nine hundred seventy-nine thousand, seventy-seven".