66440034 has 16 divisors (see below), whose sum is σ = 147644640. Its totient is φ = 22146660.

The previous prime is 66440021. The next prime is 66440071. The reversal of 66440034 is 43004466.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 615132 + ... + 615239.

It is an arithmetic number, because the mean of its divisors is an integer number (9227790).

Almost surely, 2^66440034 is an apocalyptic number.

66440034 is an abundant number, since it is smaller than the sum of its proper divisors (81204606).

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

66440034 is a wasteful number, since it uses less digits than its factorization.

66440034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230382 (or 1230376 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 66440034 is about 8151.0756345405. The cubic root of 66440034 is about 405.0201361730.

The spelling of 66440034 in words is "sixty-six million, four hundred forty thousand, thirty-four".