80767621 has 6 divisors (see below), whose sum is σ = 88777766. Its totient is φ = 73425000.

The previous prime is 80767607. The next prime is 80767649. The reversal of 80767621 is 12676708.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 47416996 + 33350625 = 6886^2 + 5775^2 .

It is not a de Polignac number, because 80767621 - 2¹³ = 80759429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80767691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 333630 + ... + 333871.

Almost surely, 2^80767621 is an apocalyptic number.

It is an amenable number.

80767621 is a deficient number, since it is larger than the sum of its proper divisors (8010145).

80767621 is a wasteful number, since it uses less digits than its factorization.

80767621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667523 (or 667512 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 80767621 is about 8987.0807829907. The cubic root of 80767621 is about 432.2607111853.

The spelling of 80767621 in words is "eighty million, seven hundred sixty-seven thousand, six hundred twenty-one".