66723862 has 4 divisors (see below), whose sum is σ = 100085796. Its totient is φ = 33361930.

The previous prime is 66723857. The next prime is 66723863. The reversal of 66723862 is 26832766.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66723863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16680964 + ... + 16680967.

It is an arithmetic number, because the mean of its divisors is an integer number (25021449).

Almost surely, 2^66723862 is an apocalyptic number.

66723862 is a deficient number, since it is larger than the sum of its proper divisors (33361934).

66723862 is a wasteful number, since it uses less digits than its factorization.

66723862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33361933.

The product of its digits is 145152, while the sum is 40.

The square root of 66723862 is about 8168.4675429361. The cubic root of 66723862 is about 405.5960577496.

The spelling of 66723862 in words is "sixty-six million, seven hundred twenty-three thousand, eight hundred sixty-two".