66032975380 has 48 divisors (see below), whose sum is σ = 143244541440. Its totient is φ = 25542921600.

The previous prime is 66032975369. The next prime is 66032975387. The reversal of 66032975380 is 8357923066.

It is a happy number.

It is a super-2 number, since 2×66032975380² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66032975387) 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, 848715 + ... + 923245.

It is an arithmetic number, because the mean of its divisors is an integer number (2984261280).

Almost surely, 2^66032975380 is an apocalyptic number.

It is an amenable number.

66032975380 is an abundant number, since it is smaller than the sum of its proper divisors (77211566060).

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

66032975380 is a wasteful number, since it uses less digits than its factorization.

66032975380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76000 (or 75998 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 66032975380 in words is "sixty-six billion, thirty-two million, nine hundred seventy-five thousand, three hundred eighty".