66634696 has 16 divisors (see below), whose sum is σ = 132289740. Its totient is φ = 31357440.

The previous prime is 66634693. The next prime is 66634697. The reversal of 66634696 is 69643666.

It can be written as a sum of positive squares in 2 ways, for example, as 59505796 + 7128900 = 7714^2 + 2670^2 .

It is a super-2 number, since 2×66634696² = 8880365422024832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66634693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244845 + ... + 245116.

Almost surely, 2^66634696 is an apocalyptic number.

It is an amenable number.

66634696 is a deficient number, since it is larger than the sum of its proper divisors (65655044).

66634696 is a wasteful number, since it uses less digits than its factorization.

66634696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489984 (or 489980 counting only the distinct ones).

The product of its digits is 839808, while the sum is 46.

The square root of 66634696 is about 8163.0077789991. The cubic root of 66634696 is about 405.4153053233.

The spelling of 66634696 in words is "sixty-six million, six hundred thirty-four thousand, six hundred ninety-six".