66061576 has 32 divisors (see below), whose sum is σ = 145391040. Its totient is φ = 27546048.

The previous prime is 66061571. The next prime is 66061577. The reversal of 66061576 is 67516066.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (66061571) 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, 13870 + ... + 18013.

It is an arithmetic number, because the mean of its divisors is an integer number (4543470).

Almost surely, 2^66061576 is an apocalyptic number.

It is an amenable number.

66061576 is an abundant number, since it is smaller than the sum of its proper divisors (79329464).

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

66061576 is a wasteful number, since it uses less digits than its factorization.

66061576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31933 (or 31929 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 66061576 is about 8127.8272619440. The cubic root of 66061576 is about 404.2496414803.

The spelling of 66061576 in words is "sixty-six million, sixty-one thousand, five hundred seventy-six".