33666665342640 has 80 divisors (see below), whose sum is σ = 113854540985856. Its totient is φ = 8161615840000.

The previous prime is 33666665342593. The next prime is 33666665342683. The reversal of 33666665342640 is 4624356666633.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×33666665342640² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6376259736 + ... + 6376265015.

Almost surely, 2^{33666665342640} is an apocalyptic number.

33666665342640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33666665342640 is an abundant number, since it is smaller than the sum of its proper divisors (80187875643216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33666665342640 is a wasteful number, since it uses less digits than its factorization.

33666665342640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12752524778 (or 12752524772 counting only the distinct ones).

The product of its (nonzero) digits is 201553920, while the sum is 60.

The spelling of 33666665342640 in words is "thirty-three trillion, six hundred sixty-six billion, six hundred sixty-five million, three hundred forty-two thousand, six hundred forty".