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40000066 = 220000033
BaseRepresentation
bin1001100010010…
…1101001000010
32210021012202221
42120211221002
540220000231
63545201254
7663665161
oct230455102
983235687
1040000066
1120640707
121149022a
1383968a2
1454533d8
1537a1d11
hex2625a42

40000066 has 4 divisors (see below), whose sum is σ = 60000102. Its totient is φ = 20000032.

The previous prime is 40000061. The next prime is 40000123. The reversal of 40000066 is 66000004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 35652841 + 4347225 = 5971^2 + 2085^2 .

40000066 is a modest number, since divided by 66 gives 40 as remainder.

It is not an unprimeable number, because it can be changed into a prime (40000061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000015 + ... + 10000018.

Almost surely, 240000066 is an apocalyptic number.

40000066 is a deficient number, since it is larger than the sum of its proper divisors (20000036).

40000066 is a wasteful number, since it uses less digits than its factorization.

40000066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20000035.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 40000066 is about 6324.5605380927. The cubic root of 40000066 is about 341.9953774326.

The spelling of 40000066 in words is "forty million, sixty-six", and thus it is an aban number, an eban number, and an uban number.

Divisors: 1 2 20000033 40000066