976720663 has 2 divisors, whose sum is σ = 976720664. Its totient is φ = 976720662.

The previous prime is 976720643. The next prime is 976720727. The reversal of 976720663 is 366027679.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-976720663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (976720603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488360331 + 488360332.

It is an arithmetic number, because the mean of its divisors is an integer number (488360332).

Almost surely, 2^976720663 is an apocalyptic number.

976720663 is a deficient number, since it is larger than the sum of its proper divisors (1).

976720663 is an equidigital number, since it uses as much as digits as its factorization.

976720663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 46.

The square root of 976720663 is about 31252.5305055447. The cubic root of 976720663 is about 992.1792157862.

The spelling of 976720663 in words is "nine hundred seventy-six million, seven hundred twenty thousand, six hundred sixty-three".