66701512 has 8 divisors (see below), whose sum is σ = 125065350. Its totient is φ = 33350752.

The previous prime is 66701483. The next prime is 66701521. The reversal of 66701512 is 21510766.

It can be written as a sum of positive squares in only one way, i.e., 66683556 + 17956 = 8166^2 + 134^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×66701512² = 8898183406172288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4168837 + ... + 4168852.

Almost surely, 2^66701512 is an apocalyptic number.

It is an amenable number.

66701512 is a deficient number, since it is larger than the sum of its proper divisors (58363838).

66701512 is a wasteful number, since it uses less digits than its factorization.

66701512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8337695 (or 8337691 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 66701512 is about 8167.0993626869. The cubic root of 66701512 is about 405.5507661855.

The spelling of 66701512 in words is "sixty-six million, seven hundred one thousand, five hundred twelve".