77025621 has 24 divisors (see below), whose sum is σ = 107252640. Its totient is φ = 49155232.

The previous prime is 77025587. The next prime is 77025629. The reversal of 77025621 is 12652077.

It is not a de Polignac number, because 77025621 - 2¹⁷ = 76894549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77025629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 390895 + ... + 391091.

It is an arithmetic number, because the mean of its divisors is an integer number (4468860).

Almost surely, 2^77025621 is an apocalyptic number.

It is an amenable number.

77025621 is a deficient number, since it is larger than the sum of its proper divisors (30227019).

77025621 is a wasteful number, since it uses less digits than its factorization.

77025621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353 (or 306 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 77025621 is about 8776.4241579359. The cubic root of 77025621 is about 425.4792674065.

Adding to 77025621 its reverse (12652077), we get a palindrome (89677698).

The spelling of 77025621 in words is "seventy-seven million, twenty-five thousand, six hundred twenty-one".