976664421 has 6 divisors (see below), whose sum is σ = 1410737510. Its totient is φ = 651109608.

The previous prime is 976664411. The next prime is 976664431. The reversal of 976664421 is 124466679.

It is an interprime number because it is at equal distance from previous prime (976664411) and next prime (976664431).

It can be written as a sum of positive squares in only one way, i.e., 623750625 + 352913796 = 24975^2 + 18786^2 .

It is not a de Polignac number, because 976664421 - 2⁵ = 976664389 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (976664411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54259126 + ... + 54259143.

Almost surely, 2^976664421 is an apocalyptic number.

It is an amenable number.

976664421 is a deficient number, since it is larger than the sum of its proper divisors (434073089).

976664421 is a wasteful number, since it uses less digits than its factorization.

976664421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108518275 (or 108518272 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 976664421 is about 31251.6306934534. The cubic root of 976664421 is about 992.1601713733.

The spelling of 976664421 in words is "nine hundred seventy-six million, six hundred sixty-four thousand, four hundred twenty-one".