66432693 has 16 divisors (see below), whose sum is σ = 89640000. Its totient is φ = 43760640.

The previous prime is 66432689. The next prime is 66432697. The reversal of 66432693 is 39623466.

It is an interprime number because it is at equal distance from previous prime (66432689) and next prime (66432697).

It is not a de Polignac number, because 66432693 - 2² = 66432689 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66432697) 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, 147733 + ... + 148181.

It is an arithmetic number, because the mean of its divisors is an integer number (5602500).

Almost surely, 2^66432693 is an apocalyptic number.

It is an amenable number.

66432693 is a deficient number, since it is larger than the sum of its proper divisors (23207307).

66432693 is a wasteful number, since it uses less digits than its factorization.

66432693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932.

The product of its digits is 139968, while the sum is 39.

The square root of 66432693 is about 8150.6253134345. The cubic root of 66432693 is about 405.0052186494.

The spelling of 66432693 in words is "sixty-six million, four hundred thirty-two thousand, six hundred ninety-three".