66979026 has 48 divisors (see below), whose sum is σ = 147961944. Its totient is φ = 21894912.

The previous prime is 66979021. The next prime is 66979027. The reversal of 66979026 is 62097966.

It can be written as a sum of positive squares in 4 ways, for example, as 63920025 + 3059001 = 7995^2 + 1749^2 .

It is not an unprimeable number, because it can be changed into a prime (66979021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 387076 + ... + 387248.

Almost surely, 2^66979026 is an apocalyptic number.

66979026 is an abundant number, since it is smaller than the sum of its proper divisors (80982918).

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

66979026 is a wasteful number, since it uses less digits than its factorization.

66979026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 66979026 is about 8184.0714806263. The cubic root of 66979026 is about 406.1124240742.

The spelling of 66979026 in words is "sixty-six million, nine hundred seventy-nine thousand, twenty-six".