764566554032661 has 8 divisors (see below), whose sum is σ = 1019425016392960. Its totient is φ = 509709563847072.

The previous prime is 764566554032651. The next prime is 764566554032663. The reversal of 764566554032661 is 166230455665467.

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

It is not a de Polignac number, because 764566554032661 - 2²³ = 764566545644053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 764566554032592 and 764566554032601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764566554032663) 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, 366831301 + ... + 368909658.

It is an arithmetic number, because the mean of its divisors is an integer number (127428127049120).

Almost surely, 2^{764566554032661} is an apocalyptic number.

It is an amenable number.

764566554032661 is a deficient number, since it is larger than the sum of its proper divisors (254858462360299).

764566554032661 is a wasteful number, since it uses less digits than its factorization.

764566554032661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736087355.

The product of its (nonzero) digits is 653184000, while the sum is 66.

The spelling of 764566554032661 in words is "seven hundred sixty-four trillion, five hundred sixty-six billion, five hundred fifty-four million, thirty-two thousand, six hundred sixty-one".