761665536 has 216 divisors, whose sum is σ = 2325943620. Its totient is φ = 239984640.

The previous prime is 761665523. The next prime is 761665537. The reversal of 761665536 is 635566167.

It is a junction number, because it is equal to n+sod(n) for n = 761665491 and 761665500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (761665537) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 17713131 + ... + 17713173.

Almost surely, 2^761665536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 761665536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1162971810).

761665536 is an abundant number, since it is smaller than the sum of its proper divisors (1564278084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

761665536 is a wasteful number, since it uses less digits than its factorization.

761665536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 79 counting only the distinct ones).

The product of its digits is 680400, while the sum is 45.

The square root of 761665536 is about 27598.2886425952. The cubic root of 761665536 is about 913.2466791652.

The spelling of 761665536 in words is "seven hundred sixty-one million, six hundred sixty-five thousand, five hundred thirty-six".