77620059661 has 8 divisors (see below), whose sum is σ = 77712053760. Its totient is φ = 77528123472.

The previous prime is 77620059659. The next prime is 77620059689. The reversal of 77620059661 is 16695002677.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77620059661 - 2¹ = 77620059659 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 (77620059611) 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 7 ways as a sum of consecutive naturals, for example, 3035616 + ... + 3061078.

It is an arithmetic number, because the mean of its divisors is an integer number (9714006720).

Almost surely, 2^77620059661 is an apocalyptic number.

It is an amenable number.

77620059661 is a deficient number, since it is larger than the sum of its proper divisors (91994099).

77620059661 is a wasteful number, since it uses less digits than its factorization.

77620059661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28955.

The product of its (nonzero) digits is 952560, while the sum is 49.

The spelling of 77620059661 in words is "seventy-seven billion, six hundred twenty million, fifty-nine thousand, six hundred sixty-one".