83377745661 has 8 divisors (see below), whose sum is σ = 127051802944. Its totient is φ = 47644426080.

The previous prime is 83377745653. The next prime is 83377745701. The reversal of 83377745661 is 16654777338.

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

It is not a de Polignac number, because 83377745661 - 2³ = 83377745653 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83377745621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1985184400 + ... + 1985184441.

It is an arithmetic number, because the mean of its divisors is an integer number (15881475368).

Almost surely, 2^83377745661 is an apocalyptic number.

It is an amenable number.

83377745661 is a deficient number, since it is larger than the sum of its proper divisors (43674057283).

83377745661 is a wasteful number, since it uses less digits than its factorization.

83377745661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3970368851.

The product of its digits is 17781120, while the sum is 57.

The spelling of 83377745661 in words is "eighty-three billion, three hundred seventy-seven million, seven hundred forty-five thousand, six hundred sixty-one".