66418492 has 24 divisors (see below), whose sum is σ = 137123840. Its totient is φ = 27546480.

The previous prime is 66418489. The next prime is 66418511. The reversal of 66418492 is 29481466.

It is a super-2 number, since 2×66418492² = 8822832159108128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37392 + ... + 39127.

Almost surely, 2^66418492 is an apocalyptic number.

66418492 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

66418492 is an abundant number, since it is smaller than the sum of its proper divisors (70705348).

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

66418492 is a wasteful number, since it uses less digits than its factorization.

66418492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76561 (or 76559 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 66418492 is about 8149.7541067200. The cubic root of 66418492 is about 404.9763579147.

The spelling of 66418492 in words is "sixty-six million, four hundred eighteen thousand, four hundred ninety-two".