31066664 has 8 divisors (see below), whose sum is σ = 58250010. Its totient is φ = 15533328.

The previous prime is 31066663. The next prime is 31066687. The reversal of 31066664 is 46666013.

It can be written as a sum of positive squares in only one way, i.e., 29789764 + 1276900 = 5458^2 + 1130^2 .

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

It is a super-2 number, since 2×31066664² = 1930275224177792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31066664.

It is not an unprimeable number, because it can be changed into a prime (31066661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1941659 + ... + 1941674.

Almost surely, 2^31066664 is an apocalyptic number.

It is an amenable number.

31066664 is a deficient number, since it is larger than the sum of its proper divisors (27183346).

31066664 is a wasteful number, since it uses less digits than its factorization.

31066664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3883339 (or 3883335 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 31066664 is about 5573.7477517376. The cubic root of 31066664 is about 314.3630835888.

The spelling of 31066664 in words is "thirty-one million, sixty-six thousand, six hundred sixty-four".