126665362501 has 8 divisors (see below), whose sum is σ = 128281095680. Its totient is φ = 125049938832.

The previous prime is 126665362489. The next prime is 126665362583. The reversal of 126665362501 is 105263566621.

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 126665362501 - 2¹¹ = 126665360453 is a prime.

It is a super-2 number, since 2×126665362501² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126665362591) 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 7 ways as a sum of consecutive naturals, for example, 810916 + ... + 954418.

It is an arithmetic number, because the mean of its divisors is an integer number (16035136960).

Almost surely, 2^126665362501 is an apocalyptic number.

It is an amenable number.

126665362501 is a deficient number, since it is larger than the sum of its proper divisors (1615733179).

126665362501 is a wasteful number, since it uses less digits than its factorization.

126665362501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154755.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 126665362501 in words is "one hundred twenty-six billion, six hundred sixty-five million, three hundred sixty-two thousand, five hundred one".