66417402 has 24 divisors (see below), whose sum is σ = 141111936. Its totient is φ = 20836288.

The previous prime is 66417391. The next prime is 66417443. The reversal of 66417402 is 20471466.

It is a super-2 number, since 2×66417402² = 8822542576859208, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 66417402.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17418 + ... + 20885.

It is an arithmetic number, because the mean of its divisors is an integer number (5879664).

Almost surely, 2^66417402 is an apocalyptic number.

66417402 is an abundant number, since it is smaller than the sum of its proper divisors (74694534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66417402 is a wasteful number, since it uses less digits than its factorization.

66417402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38342 (or 38325 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 66417402 is about 8149.6872332624. The cubic root of 66417402 is about 404.9741425345.

Adding to 66417402 its reverse (20471466), we get a palindrome (86888868).

The spelling of 66417402 in words is "sixty-six million, four hundred seventeen thousand, four hundred two".