737666778081 has 8 divisors (see below), whose sum is σ = 983560058784. Its totient is φ = 491775674720.

The previous prime is 737666778077. The next prime is 737666778097. The reversal of 737666778081 is 180877666737.

737666778081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 737666778081 - 2² = 737666778077 is a prime.

It is a super-2 number, since 2×737666778081² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (737666778011) 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, 575005 + ... + 1343861.

It is an arithmetic number, because the mean of its divisors is an integer number (122945007348).

Almost surely, 2^737666778081 is an apocalyptic number.

It is an amenable number.

737666778081 is a deficient number, since it is larger than the sum of its proper divisors (245893280703).

737666778081 is a wasteful number, since it uses less digits than its factorization.

737666778081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088671.

The product of its (nonzero) digits is 99574272, while the sum is 66.

The spelling of 737666778081 in words is "seven hundred thirty-seven billion, six hundred sixty-six million, seven hundred seventy-eight thousand, eighty-one".