66637147355 has 8 divisors (see below), whose sum is σ = 81059982432. Its totient is φ = 52579447488.

The previous prime is 66637147337. The next prime is 66637147387. The reversal of 66637147355 is 55374173666.

It is a happy number.

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 66637147355 - 2¹⁴ = 66637130971 is a prime.

It is a super-2 number, since 2×66637147355² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66637147297 and 66637147306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91283399 + ... + 91284128.

It is an arithmetic number, because the mean of its divisors is an integer number (10132497804).

Almost surely, 2^66637147355 is an apocalyptic number.

66637147355 is a deficient number, since it is larger than the sum of its proper divisors (14422835077).

66637147355 is a wasteful number, since it uses less digits than its factorization.

66637147355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182567605.

The product of its digits is 9525600, while the sum is 53.

The spelling of 66637147355 in words is "sixty-six billion, six hundred thirty-seven million, one hundred forty-seven thousand, three hundred fifty-five".