157665166461 has 12 divisors (see below), whose sum is σ = 248442080640. Its totient is φ = 95554646280.

The previous prime is 157665166457. The next prime is 157665166487. The reversal of 157665166461 is 164661566751.

157665166461 is a `hidden beast` number, since 1 + 5 + 7 + 6 + 6 + 516 + 64 + 61 = 666.

157665166461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 157665166461 - 2² = 157665166457 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 157665166398 and 157665166407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157665166861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 796288621 + ... + 796288818.

It is an arithmetic number, because the mean of its divisors is an integer number (20703506720).

Almost surely, 2^157665166461 is an apocalyptic number.

157665166461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

157665166461 is a deficient number, since it is larger than the sum of its proper divisors (90776914179).

157665166461 is a wasteful number, since it uses less digits than its factorization.

157665166461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592577456 (or 1592577453 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The spelling of 157665166461 in words is "one hundred fifty-seven billion, six hundred sixty-five million, one hundred sixty-six thousand, four hundred sixty-one".