66960988 has 24 divisors (see below), whose sum is σ = 119952000. Its totient is φ = 32696688.

The previous prime is 66960983. The next prime is 66960991. The reversal of 66960988 is 88906966.

It is a super-2 number, since 2×66960988² = 8967547827872288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66960983) 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 7 ways as a sum of consecutive naturals, for example, 38563 + ... + 40261.

It is an arithmetic number, because the mean of its divisors is an integer number (4998000).

Almost surely, 2^66960988 is an apocalyptic number.

It is an amenable number.

66960988 is a deficient number, since it is larger than the sum of its proper divisors (52991012).

66960988 is a wasteful number, since it uses less digits than its factorization.

66960988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929 (or 1927 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 52.

The square root of 66960988 is about 8182.9693876978. The cubic root of 66960988 is about 406.0759643342.

The spelling of 66960988 in words is "sixty-six million, nine hundred sixty thousand, nine hundred eighty-eight".