66417142 has 12 divisors (see below), whose sum is σ = 109506348. Its totient is φ = 30189500.

The previous prime is 66417137. The next prime is 66417187. The reversal of 66417142 is 24171466.

It is a super-2 number, since 2×66417142² = 8822473502896328, 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 5 ways as a sum of consecutive naturals, for example, 136984 + ... + 137467.

It is an arithmetic number, because the mean of its divisors is an integer number (9125529).

Almost surely, 2^66417142 is an apocalyptic number.

66417142 is a deficient number, since it is larger than the sum of its proper divisors (43089206).

66417142 is a wasteful number, since it uses less digits than its factorization.

66417142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274475 (or 274464 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 66417142 is about 8149.6712817144. The cubic root of 66417142 is about 404.9736140916.

The spelling of 66417142 in words is "sixty-six million, four hundred seventeen thousand, one hundred forty-two".