66126516 has 24 divisors (see below), whose sum is σ = 155282400. Its totient is φ = 21901152.

The previous prime is 66126493. The next prime is 66126523. The reversal of 66126516 is 61562166.

It is a super-2 number, since 2×66126516² = 8745432236596512, 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, 15666 + ... + 19433.

It is an arithmetic number, because the mean of its divisors is an integer number (6470100).

Almost surely, 2^66126516 is an apocalyptic number.

It is an amenable number.

66126516 is an abundant number, since it is smaller than the sum of its proper divisors (89155884).

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

66126516 is a wasteful number, since it uses less digits than its factorization.

66126516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35263 (or 35261 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 66126516 is about 8131.8211982311. The cubic root of 66126516 is about 404.3820602322.

The spelling of 66126516 in words is "sixty-six million, one hundred twenty-six thousand, five hundred sixteen".