66400111437 has 16 divisors (see below), whose sum is σ = 98165294400. Its totient is φ = 39582777600.

The previous prime is 66400111417. The next prime is 66400111483. The reversal of 66400111437 is 73411100466.

It is not a de Polignac number, because 66400111437 - 2⁶ = 66400111373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 66400111398 and 66400111407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66400111417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16490812 + ... + 16494837.

It is an arithmetic number, because the mean of its divisors is an integer number (6135330900).

Almost surely, 2^66400111437 is an apocalyptic number.

It is an amenable number.

66400111437 is a deficient number, since it is larger than the sum of its proper divisors (31765182963).

66400111437 is a wasteful number, since it uses less digits than its factorization.

66400111437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32985724.

The product of its (nonzero) digits is 12096, while the sum is 33.

The spelling of 66400111437 in words is "sixty-six billion, four hundred million, one hundred eleven thousand, four hundred thirty-seven".