660396736637 has 32 divisors (see below), whose sum is σ = 779129953920. Its totient is φ = 553064878080.

The previous prime is 660396736619. The next prime is 660396736679. The reversal of 660396736637 is 736637693066.

It is a happy number.

It is not a de Polignac number, because 660396736637 - 2¹⁶ = 660396671101 is a prime.

It is a super-2 number, since 2×660396736637² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 660396736637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660396736537) 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 31 ways as a sum of consecutive naturals, for example, 1799189 + ... + 2134917.

It is an arithmetic number, because the mean of its divisors is an integer number (24347811060).

Almost surely, 2^660396736637 is an apocalyptic number.

660396736637 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

660396736637 is a deficient number, since it is larger than the sum of its proper divisors (118733217283).

660396736637 is a wasteful number, since it uses less digits than its factorization.

660396736637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335981.

The product of its (nonzero) digits is 92588832, while the sum is 62.

The spelling of 660396736637 in words is "six hundred sixty billion, three hundred ninety-six million, seven hundred thirty-six thousand, six hundred thirty-seven".