66408962 has 4 divisors (see below), whose sum is σ = 99613446. Its totient is φ = 33204480.

The previous prime is 66408949. The next prime is 66408967. The reversal of 66408962 is 26980466.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 26980466 = 2 ⋅13490233.

It can be written as a sum of positive squares in only one way, i.e., 61952641 + 4456321 = 7871^2 + 2111^2 .

It is not an unprimeable number, because it can be changed into a prime (66408967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16602239 + ... + 16602242.

Almost surely, 2^66408962 is an apocalyptic number.

66408962 is a deficient number, since it is larger than the sum of its proper divisors (33204484).

66408962 is a wasteful number, since it uses less digits than its factorization.

66408962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33204483.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 66408962 is about 8149.1694055284. The cubic root of 66408962 is about 404.9569877605.

The spelling of 66408962 in words is "sixty-six million, four hundred eight thousand, nine hundred sixty-two".