66774632 has 8 divisors (see below), whose sum is σ = 125202450. Its totient is φ = 33387312.

The previous prime is 66774629. The next prime is 66774661. The reversal of 66774632 is 23647766.

It can be written as a sum of positive squares in only one way, i.e., 66357316 + 417316 = 8146^2 + 646^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 66774632.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4173407 + ... + 4173422.

Almost surely, 2^66774632 is an apocalyptic number.

It is an amenable number.

66774632 is a deficient number, since it is larger than the sum of its proper divisors (58427818).

66774632 is a wasteful number, since it uses less digits than its factorization.

66774632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8346835 (or 8346831 counting only the distinct ones).

The product of its digits is 254016, while the sum is 41.

The square root of 66774632 is about 8171.5746340592. The cubic root of 66774632 is about 405.6989039709.

The spelling of 66774632 in words is "sixty-six million, seven hundred seventy-four thousand, six hundred thirty-two".