77454661 has 4 divisors (see below), whose sum is σ = 78206752. Its totient is φ = 76702572.

The previous prime is 77454631. The next prime is 77454673. The reversal of 77454661 is 16645477.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77454661 - 2⁹ = 77454149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77454631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375891 + ... + 376096.

It is an arithmetic number, because the mean of its divisors is an integer number (19551688).

Almost surely, 2^77454661 is an apocalyptic number.

It is an amenable number.

77454661 is a deficient number, since it is larger than the sum of its proper divisors (752091).

77454661 is a wasteful number, since it uses less digits than its factorization.

77454661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752090.

The product of its digits is 141120, while the sum is 40.

The square root of 77454661 is about 8800.8329719408. The cubic root of 77454661 is about 426.2677917600.

The spelling of 77454661 in words is "seventy-seven million, four hundred fifty-four thousand, six hundred sixty-one".