66142436 has 12 divisors (see below), whose sum is σ = 116003580. Its totient is φ = 32998560.

The previous prime is 66142429. The next prime is 66142487. The reversal of 66142436 is 63424166.

It can be written as a sum of positive squares in 2 ways, for example, as 42328036 + 23814400 = 6506^2 + 4880^2 .

It is a super-3 number, since 3×66142436³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16091 + ... + 19778.

It is an arithmetic number, because the mean of its divisors is an integer number (9666965).

Almost surely, 2^66142436 is an apocalyptic number.

It is an amenable number.

66142436 is a deficient number, since it is larger than the sum of its proper divisors (49861144).

66142436 is a wasteful number, since it uses less digits than its factorization.

66142436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36334 (or 36332 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

The square root of 66142436 is about 8132.8000098367. The cubic root of 66142436 is about 404.4145093727.

The spelling of 66142436 in words is "sixty-six million, one hundred forty-two thousand, four hundred thirty-six".